periodic%20table Crossword Puzzles
Vocabulary Walk #2 2025-09-18
Across
- Atomic ___________ the number of protons an atom has, determines an atom's identity.
- Electron ________ negatively charged space outside the nucleus that holds the electrons.
- The total number of protons and neutrons in an atom.
- A horizontal column on the periodic table.
Down
- A vertical column on the periodic table.
- The tendency of a substance to undergo chemical changes.
- Atomic _____ the average mass number of atoms of an element.
7 Clues: A vertical column on the periodic table. • A horizontal column on the periodic table. • The total number of protons and neutrons in an atom. • The tendency of a substance to undergo chemical changes. • Atomic _____ the average mass number of atoms of an element. • Atomic ___________ the number of protons an atom has, determines an atom's identity. • ...
Media 2013-04-17
Across
- Sheldon is my favourite
- Facebook is
- activities that impart knowledge
- quiz program
- newspapers writers and photographers
- a public promotion of some prudict or service
- a radio or television show
- newspaper with half-size papers
Down
- Google,Bing and Yahoo are
- unuseful mail,leaflets
- a television programming genre that presents unscripted situations
- quality newspaper
- someone who keeps journal
- serial
- a periodic paperback publication
15 Clues: serial • Facebook is • quiz program • quality newspaper • unuseful mail,leaflets • Sheldon is my favourite • Google,Bing and Yahoo are • someone who keeps journal • a radio or television show • newspaper with half-size papers • activities that impart knowledge • a periodic paperback publication • newspapers writers and photographers • a public promotion of some prudict or service • ...
the iron giant. 2021-12-13
Across
- not somebody,
- lots of fish live in the
- the opposite of day
- opposite of backward
- human transportation
- sleeping chamber or:
- its green and it grows
Down
- goes on foot in bad weather
- a very tall building.
- dorsalis pedis or,
- manus, otherwise known as:
- work on a farm.
- your cephalic, or your h-
- common item on the periodic table beginning with i
- celestial sphere or,
15 Clues: not somebody, • work on a farm. • dorsalis pedis or, • the opposite of day • opposite of backward • human transportation • sleeping chamber or: • celestial sphere or, • a very tall building. • its green and it grows • lots of fish live in the • your cephalic, or your h- • manus, otherwise known as: • goes on foot in bad weather • common item on the periodic table beginning with i
school vocab 2025-05-08
Across
- You make paintings
- Where you sing
- You learn about shapes
- You learn about god
- The class your in
- Where you learn the periodic table
- Where you solve problems and equations
- You make beats
- Taught by JJs dad
Down
- You take this freshman year
- Where country's are
- Where you learn the past
- Where you speak baguette language
- Where you code on computers
- Study of ecosystem
15 Clues: Where you sing • You make beats • The class your in • Taught by JJs dad • You make paintings • Study of ecosystem • Where country's are • You learn about god • You learn about shapes • Where you learn the past • You take this freshman year • Where you code on computers • Where you speak baguette language • Where you learn the periodic table • Where you solve problems and equations
POTASSIUM POWER 2022-03-25
Across
- family
- series
- what group is it in? (periodic table)
- what most common element
Down
- who predicted it
- what's its name?
- what color does it appear
- who discovered it
- what color does it burn
- what's its symbol?
- what color vapor does it have
11 Clues: family • series • who predicted it • what's its name? • who discovered it • what's its symbol? • what color does it burn • what most common element • what color does it appear • what color vapor does it have • what group is it in? (periodic table)
Science Review 2021-09-16
Across
- table of elements organizes elements by qualities.
- affects mass
- number,tell us the number of protons
- horizontal rows
- positive charge
Down
- vertical columns
- , more than 1 atom bonded
- negative charge
- more than 1 element
- many atoms
- the basic unit of an element
11 Clues: many atoms • affects mass • negative charge • horizontal rows • positive charge • vertical columns • more than 1 element • , more than 1 atom bonded • the basic unit of an element • number,tell us the number of protons • table of elements organizes elements by qualities.
Science 2020-12-02
Across
- inhale
- exhale
- a lot of this gas is in the stratosphere
- light shining on plants
- vary in concentration
- Conduction convection and radiation
- When water dissolves it becomes this
- cow farts
Down
- Nitrogen oxygen and argon
- symbol:N Atomic number:7
- the sky
- gram and pounds
- a gas that is everywhere
- elements in group 18 on periodic table are this
- Methane is one of these
15 Clues: inhale • exhale • the sky • cow farts • gram and pounds • vary in concentration • light shining on plants • Methane is one of these • symbol:N Atomic number:7 • a gas that is everywhere • Nitrogen oxygen and argon • Conduction convection and radiation • When water dissolves it becomes this • a lot of this gas is in the stratosphere • elements in group 18 on periodic table are this
Chemistry 2025-05-09
Across
- invokes a reaction
- acid and base in harmony
- a chemical change
- resists pH changes
- basic building block of matter
- liquid to gas
- basic building block of organic life
Down
- shiny, malleable, and conductive
- group of atoms stuck together
- a paper that exposes the truth
- electron loss
- gas to liquid
- atom's core
- each has a name in the periodic table
- ranges from acidic to basic
15 Clues: atom's core • electron loss • gas to liquid • liquid to gas • a chemical change • invokes a reaction • resists pH changes • acid and base in harmony • ranges from acidic to basic • group of atoms stuck together • a paper that exposes the truth • basic building block of matter • shiny, malleable, and conductive • basic building block of organic life • each has a name in the periodic table
ADJECTIVES 2022-08-20
Across
- , surprising
- ability to work
- , periodic assessment in school
- , what we look forward to
- , invisible but unstoppable
Down
- , a reason to hang on
- , for lighting the room
- , can be soft or blind.
- , the big entrance to keep strangers out
- , short journey
- , to take away
11 Clues: , surprising • ability to work • , short journey • , to take away • , a reason to hang on • , can be soft or blind. • , for lighting the room • , what we look forward to • , invisible but unstoppable • , periodic assessment in school • , the big entrance to keep strangers out
Identify Who 2025-11-06
Across
- Developed the periodic table
- Discovered penicillin
- Proposed theory of radioactivity
- Discovered insulin
- First person on the moon
- Father of evolution theory
Down
- Invented the telephone
- Invented the electric bulb
- Developed laws of motion and gravity
- Father of modern physics
- Discovered the electron
11 Clues: Discovered insulin • Discovered penicillin • Invented the telephone • Discovered the electron • Father of modern physics • First person on the moon • Invented the electric bulb • Father of evolution theory • Developed the periodic table • Proposed theory of radioactivity • Developed laws of motion and gravity
Chapter 7 & 8 Chemistry Vocabulary 2014-11-23
Across
- These structures both have the same number of valence electrons and same atom position, but different electron positions.
- This is the energy released when an atom in a gas phase accepts an electron - this periodic trend decreases from top to bottom and increases from left to right.
- Elements in period three and higher can have more than eight electrons.
- The distance between the nucleus of an atom and the valence electrons, in which this trend increases from top to bottom and decreases from left to right.
- This is the minimum energy required to remove an electron - this trend decreases from top to bottom and increases from left to right.
- Some electrons can have less than eight electrons, in which they do not achieve a full octet and this is okay.
- This element does not achieve a full "octet" but rather a full "duet."
Down
- Electrons in these bonds are NOT shared equally between two atoms.
- Electrons in these bonds ARE shared equally between two atoms - often times between identical atoms.
- The ability of an atom to attract electrons toward itself in a bond - this is a trend of the periodic table, in which it decreases from top to bottom and increases from left to right.
- A bond between a metal and a non-metal, which is an interaction between ions.
- When comparing the neutral atom with an ion, cations are smaller and anions are larger - this periodic trend increases from top to bottom and decreases from left to right.
12 Clues: Electrons in these bonds are NOT shared equally between two atoms. • This element does not achieve a full "octet" but rather a full "duet." • Elements in period three and higher can have more than eight electrons. • A bond between a metal and a non-metal, which is an interaction between ions. • ...
Periodic Table Crossword Puzzle 2013-04-30
Across
- The atomic number of this element is 11.
- The atomic number of this element is 8.
- The atomic number of this element is 17.
- The atomic number of this element is 47.
- The atomic number of this element is 50.
- The atomic number of this element is 79.
- The atomic number of this element is 22.
- The atomic number of this is 1.
- Particles of this atom that has a positive charge.
- The atomic number of this element is 2.
Down
- The atomic number of this element is 86.
- The atomic number of this element is 29.
- Particles of the atom that has a negative charge.
- The atomic number of this element is 3.
- The atomic number of this element is 27.
- The atomic number of this element is 7.
- Number/ The number of protons in the nucleus is called ____________?
- The atomic number of this element is 10.
- the atomic number of this element is 26.
19 Clues: The atomic number of this is 1. • The atomic number of this element is 8. • The atomic number of this element is 3. • The atomic number of this element is 7. • The atomic number of this element is 2. • The atomic number of this element is 86. • The atomic number of this element is 29. • The atomic number of this element is 11. • The atomic number of this element is 17. • ...
Bonding & The Periodic Table 2025-12-07
Across
- A substance that can conduct electricity only under specific conditions
- Describing when something can be hammered into different shapes
- A particle that has a negative charge and can leave or join atoms.
- Behaves like a metal and/or a nonmetal depending on the situation.
- Atoms want their outer shell to become ________
- The outermost electrons that decide how an atom behaves
- The first element on the Periodic Table, that has one proton.
Down
- Shiny, conductive, and lose electrons easily.
- A full outer shell means an atom is …
- The type of property that describes an element's ability to react with other elements to create a new substance
- Nonmetals do this with electrons to become more stable
- Describing when a material can be made into wires
- The shine that a substance has
- The type of property that is observed without changing the identity of the element
- Metals do this with electrons to become more stable.
- Brittle, dull, and more likely to gain electrons.
- A particle made up of two or more atoms
- The ease and speed with which an element combines, or reacts, with another element
- When two atoms share or transfer electrons
19 Clues: The shine that a substance has • A full outer shell means an atom is … • A particle made up of two or more atoms • When two atoms share or transfer electrons • Shiny, conductive, and lose electrons easily. • Atoms want their outer shell to become ________ • Describing when a material can be made into wires • Brittle, dull, and more likely to gain electrons. • ...
periodic table crossword 2013-05-15
Across
- CO2
- oppisite of non-metals
Down
- O2
- first on the periodic table
- this is water
- C
- building blocks of life
- C6H12O6
8 Clues: C • O2 • CO2 • C6H12O6 • this is water • oppisite of non-metals • building blocks of life • first on the periodic table
Vocabulary Unit 1 Chs 4-5 2021-01-17
Across
- A horizontal row of elements on the periodic table of elements
- The force of attraction between oppositely charged particles
- Positively charged particles inside the nucleus of an atom
- Negatively charged particles surrounding the nucleus of an atom
- A bond in which valence electrons are shared between atoms.
- A one or two letter abbreviation for an element.
- A charged particle.
Down
- The electrons in the outermost energy level of an atom, Which determine how an atom bonds with other atoms
- A combination of chemical symbols and numbers used to represent a compound or indicate atoms present in a molecule.
- Elements that have properties of both metals and nonmetals
- The number of protons in the nucleus of an atom.
- The elements in the far right column of the periodic table, which have full outer energy levels and will not combine with other elements under ordinary conditions
- Atoms of the same element have the same number of protons but different numbers of neutrons
- Particles with no charge found inside the nucleus of an atom
- The number after a symbol that tells how many atoms of an element are in each molecule
- The amount of matter in an object.
16 Clues: A charged particle. • The amount of matter in an object. • The number of protons in the nucleus of an atom. • A one or two letter abbreviation for an element. • Elements that have properties of both metals and nonmetals • Positively charged particles inside the nucleus of an atom • A bond in which valence electrons are shared between atoms. • ...
Chapter 2 Chemistry Vocabulary 2020-09-09
Across
- The starting substance in a chemical reaction
- Matter that has its own definite shape and volume, is in-compressible, and expands slightly when heated
- Vertical column on the periodic table that can also be called a family
- A measure of space that is taken up, or occupied
- A horizontal row of elements in the modern periodic table
- matter that conforms to the shape of its container, fills the containers entire volume, and is easily compressed
- Can be used to physically separate most homogeneous mixtures
- A pure substance that cant be broken down physically or chemically
- Matter that has a definite composition and is also known as a chemical
Down
- A uniform mixture that can contain solids, liquids, or gases; also called a homogeneous mixture
- A technique that uses a porous barrier to separate a solid from a liquid
- A substance formed during a chemical reaction
- A solid produced during a chemical reaction in a solution
- A gaseous state of a substance- liquid or solid at room temp
- A measure that reflects the amount of matter
- Form of matter that flows, has constant volume, and takes the shape of its container
16 Clues: A measure that reflects the amount of matter • The starting substance in a chemical reaction • A substance formed during a chemical reaction • A measure of space that is taken up, or occupied • A solid produced during a chemical reaction in a solution • A horizontal row of elements in the modern periodic table • ...
Mr.Jantz Chemistry vocab 2021-09-07
Across
- A column of elements on the Periodic table having similar properties and the same valence electron number
- a number in front of a chemical formula stating how many sets of the compound is being used.
- A starting substance in a chemical reaction
- A subatomic particle with no charge
- two or more substance not chemically combined together in the same contanier
- the number of protons added to the number of neutrons in an atom of an element
- A substance produced in a chemical reaction
- A subatomic particle with a negative charge
- a number located immediately after the atoms symbol that it states how many atoms of that element is in the coumpound
- The smallest particle of an element
Down
- A substance whose particle is made of two or more different kinds of elements
- The number of protons in an atoms nuclus
- A positive charged subatomic particle
- A fundimental substance that cannot be broken down into a simpler substance by chemical or physical means
- a row of elements of the periodic table having the same number of energy levels that electrons are in
- a one or two letter combination used to represent a type of element in chemical equations
16 Clues: A subatomic particle with no charge • A positive charged subatomic particle • The smallest particle of an element • The number of protons in an atoms nuclus • A starting substance in a chemical reaction • A substance produced in a chemical reaction • A subatomic particle with a negative charge • ...
Chemical elements 2022-10-28
Across
- They account for 10% of the chemical compounds in humans.
- In the gaseous state, its referred to as water vapor.
- Non-metal from the group of aerobes in the periodic table.
- acids Organic chemical compounds, biopolymers made of nucleotides.
- Is involved in the transport of calcium and potassium ions across cell membranes.
- Is an essential element involved in the production of thyroid hormones.
- The smallest functional part of a living organism.
- A chemical element or a chemical compound created in nature as a result of natural geological or cosmological processes, has a crystalline structure.
- Elements that occur in the body in large amounts(they constitute 0.01% or more of its dry mass).
Down
- Also called saccharides or just sugars.
- part of a multicellular organism with a specific structure and function.
- They are found in all living organisms and viruses, the basic building block of the organism.
- The chemical element of atomic number 6.
- Is increasingly used as an ingredient in mineral fertilizers.
- Elements elements that are essential for life, because the body uses them to build its structures and uses them in metabolic processes.
- Chemical element from the group of alkaline earths in the periodic table.
16 Clues: Also called saccharides or just sugars. • The chemical element of atomic number 6. • The smallest functional part of a living organism. • In the gaseous state, its referred to as water vapor. • They account for 10% of the chemical compounds in humans. • Non-metal from the group of aerobes in the periodic table. • ...
Atoms to Compounds 2024-09-03
Across
- The ____ gases are the last group of elements of the periodic table, known for being unreactive
- Atoms of the same element with different numbers of neutrons
- The process of preparing food by applying heat, causing chemical changes
- The chemical ____ is a symbolic representation of a chemical reaction using chemical formulas
- The mass ___ is the total number of protons and neutrons in an atom's nucleus
- Elements that are shiny, conductive, and can be shaped
- A gas that makes up about 78% of the Earth's atmosphere
- A _____ change alters the form or appearance of a substance without forming a new substance
- Change of ____ is a transition of a substance from one form (e.g. liquid) to another by adding or removing heat
- A chemical reaction involving oxygen that produces heat and light
- A slow chemical change that occurs iron reacts with oxygen and water
- A group of atoms bonded together
- A gas essential for respiration and combustion
- A vertical column in the periodic table with elements that have similar properties
- An ______ reaction is a chemical reaction that releases energy, usually as heat
- A horizontal row in the periodic table
- An atom that has gained or lost electrons, becoming charged
- A shiny, grey metal that burns with a bright white flame
- A property of a substance that can change during a chemical reaction
- Hydrogen ____ is a compound that can be broken down into two gases through a chemical reaction
- A substance that undergoes change in a chemical reaction
- The central part of an atom, containing protons and neutrons
- The smallest unit of matter which cannot be split
Down
- The chemical ____ is a representation of a compound showing the elements and their ratios
- The ___ number is the number of protons in the nucleus of an atom
- An ______ reaction is a chemical reaction that absorbs energy, usually in the form of heat
- A _____ change creates a new substance by breaking current bonds and forming new ones
- Elements that are typically dull and poor conductors
- A substance formed as a result of a chemical reaction
- The atomic ___ is the average mass of an atom, based on the mass of protons, neutrons, and electrons
- A positively charged particle in the nucleus of an atom
- A negatively charged particle orbiting the nucleus of an atom
- A chemical ____ is a one- or two-letter representation of an element
- A pure substance made of only one type of atom
- A substance that could be produced by a chemical reaction and cause bubbles
- The _____ table shows all known elements arranged by atomic number
- The ___ equation is a way to represent a chemical reaction using words instead of symbols
- A reddish-brown metal that does not easily burn
- A substance made of two or more different elements chemically bonded
- A neutral particle found in the nucleus of an atom
- Elements with properties between those of metals and nonmetals
- A smell produced by a substance, often a sign of a chemical change
42 Clues: A group of atoms bonded together • A horizontal row in the periodic table • A gas essential for respiration and combustion • A pure substance made of only one type of atom • A reddish-brown metal that does not easily burn • The smallest unit of matter which cannot be split • A neutral particle found in the nucleus of an atom • ...
Physical Science Vocab 2020-10-13
Across
- /A subatomic particle of about the same mass as a proton but without an electric charge.
- solid at room temperature,
- /A stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- /Has characteristics of both metals and nonmetals
- /A positively charged ion
- /an element that is typically
- /Substance formed when two or more elements in which the exact combination and proportion of elements is always the same
- /A stable, positive charged, and subatomic particle that occurs in all atomic nuclei
- /A negatively charged ion
- /When atoms come together in a compound to create many things we need in everyday life
- /A set of elements occupying an entire horizontal row in the periodic table
- /a state of matter
- /A set of elements occupying an entire vertical column in the periodic table
- /A general direction in which something is developing or changing
- /The elements in the middle of the periodic table
- /an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- /The total number of protons and neutrons in a nucleus
- /The number of protons in the nucleus of an atom, which determines the chemical properties of an element
- a good conductor of heat and
- /Attraction formed between atoms when they share electrons
- /The 18 groups of elements in a periodic table
- /The basic unit of a chemical element.
- /Attraction formed between oppositely charged ions in an ionic compound
Down
- /Chemical shorthand that uses symbols to tell what elements are in compound and their ratios
- /The positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- /A compound that is composed of two elements
- /The arrangement of electrons in energy levels around an atomic nucleus
- /A cloud around the nucleus that shows where electrons areion
- /Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
- /A neutral particle that forms as a result of electron sharing
- /Is an outer shell electron that is associated with an atom
- /The organized array of all the chemical elements in order of increasing atomic number
- /An atom that has more protons than electrons
- /A compound composed of two elements. One of the elements is metal and the other is non-metal
- /an element that is typically dull in appearance and is a poor conductor of heat and electricity many nonmetals are gases at room temperature, but some are solids
- /An atom that has more electrons than protons. It is also called a anion
- /A letter or symbol to represent something else like a numeral
- /The mass of an atom of a chemical element expressed in atomic mass units
38 Clues: /a state of matter • /A positively charged ion • /A negatively charged ion • solid at room temperature, • a good conductor of heat and • /an element that is typically • /The basic unit of a chemical element. • /A compound that is composed of two elements • /An atom that has more protons than electrons • /The 18 groups of elements in a periodic table • ...
Crossword Puzzle 2021-10-12
Across
- stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- They are a source of nuclear energy
- of a positively charged nucleus with electrons revolving around it in any of many possible circular orbits each corresponding to a distinct energy state.
- positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
- mass-the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the
- measure of the amount of information on a storage medium (tape or disk)
- (the mass number) or to the average number allowing for the relative abundances of different isotopes.
- firm and stable in shape; not liquid or fluid.
- Table- a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns
- a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Down
- any substance composed of identical molecules consisting of atoms of two or more chemical elements.
- number-the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- a part or aspect of something abstract
- cloud - A group of electrons circulating around a nucleus or a molecule
- substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
- the Father of the Periodic Table.
- a coherent, typically large body of matter with no definite shape
19 Clues: the Father of the Periodic Table. • They are a source of nuclear energy • a part or aspect of something abstract • firm and stable in shape; not liquid or fluid. • a coherent, typically large body of matter with no definite shape • cloud - A group of electrons circulating around a nucleus or a molecule • ...
Crossword Puzzle 2021-10-12
Across
- stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- They are a source of nuclear energy
- of a positively charged nucleus with electrons revolving around it in any of many possible circular orbits each corresponding to a distinct energy state.
- positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
- mass-the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the
- measure of the amount of information on a storage medium (tape or disk)
- (the mass number) or to the average number allowing for the relative abundances of different isotopes.
- firm and stable in shape; not liquid or fluid.
- Table- a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns
- a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Down
- any substance composed of identical molecules consisting of atoms of two or more chemical elements.
- number-the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- a part or aspect of something abstract
- cloud - A group of electrons circulating around a nucleus or a molecule
- substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
- the Father of the Periodic Table.
- a coherent, typically large body of matter with no definite shape
19 Clues: the Father of the Periodic Table. • They are a source of nuclear energy • a part or aspect of something abstract • firm and stable in shape; not liquid or fluid. • a coherent, typically large body of matter with no definite shape • cloud - A group of electrons circulating around a nucleus or a molecule • ...
Atomic Vocabulary 2022-09-08
Across
- pure substance
- pounded into a sheet
- not shinny
- multiple elements
- doesn't share electricity or heat
- negative charge
- smallest unit of matter that we know of
Down
- rust when oxygen of water is applied
- on the zig-zag line kinda like a metal
- good at sharing heat and electricity
- determains the reactivity of an element
- opposite of metals
- can be stretched into a thin wire
- positive charge
- shiny
- neutral charge
- largest section on the periodic table
17 Clues: shiny • not shinny • pure substance • neutral charge • positive charge • negative charge • multiple elements • opposite of metals • pounded into a sheet • can be stretched into a thin wire • doesn't share electricity or heat • rust when oxygen of water is applied • good at sharing heat and electricity • largest section on the periodic table • on the zig-zag line kinda like a metal • ...
Atomic Vocabulary 2022-09-08
Across
- pure substance
- pounded into a sheet
- not shinny
- multiple elements
- doesn't share electricity or heat
- negative charge
- smallest unit of matter that we know of
Down
- rust when oxygen of water is applied
- on the zig-zag line kinda like a metal
- good at sharing heat and electricity
- determains the reactivity of an element
- opposite of metals
- can be stretched into a thin wire
- positive charge
- shiny
- neutral charge
- largest section on the periodic table
17 Clues: shiny • not shinny • pure substance • neutral charge • positive charge • negative charge • multiple elements • opposite of metals • pounded into a sheet • can be stretched into a thin wire • doesn't share electricity or heat • rust when oxygen of water is applied • good at sharing heat and electricity • largest section on the periodic table • on the zig-zag line kinda like a metal • ...
Atomic Vocabulary 2022-09-08
Across
- pure substance
- pounded into a sheet
- not shinny
- multiple elements
- doesn't share electricity or heat
- negative charge
- smallest unit of matter that we know of
Down
- rust when oxygen of water is applied
- on the zig-zag line kinda like a metal
- good at sharing heat and electricity
- determains the reactivity of an element
- opposite of metals
- can be stretched into a thin wire
- positive charge
- shiny
- neutral charge
- largest section on the periodic table
17 Clues: shiny • not shinny • pure substance • neutral charge • positive charge • negative charge • multiple elements • opposite of metals • pounded into a sheet • can be stretched into a thin wire • doesn't share electricity or heat • rust when oxygen of water is applied • good at sharing heat and electricity • largest section on the periodic table • on the zig-zag line kinda like a metal • ...
Molecules and More! 2023-05-12
Across
- HCO3-
- A positively charged ion
- Prefix for four
- Elements on the right side of the periodic table
- Creator of “plum pudding” model
- Atoms having the same number of protons, but different number of neutrons
- Groups 3 - 12 are called?
Down
- Who conducted the gold foil experiment?
- HNO2
- Group 7A elements are called?
- CO
- MnO4-
- force of attraction between oppositely charged atoms is an ____ bond
- Prefix for seven
- NH4+
- Shiny, ductile, and conductive
- A negatively charged ion
17 Clues: CO • HNO2 • NH4+ • HCO3- • MnO4- • Prefix for four • Prefix for seven • A positively charged ion • A negatively charged ion • Groups 3 - 12 are called? • Group 7A elements are called? • Shiny, ductile, and conductive • Creator of “plum pudding” model • Who conducted the gold foil experiment? • Elements on the right side of the periodic table • ...
Molecules and More 2023-05-05
Across
- HCO3-
- A positively charged ion
- Prefix for four
- Elements on the right side of the periodic table
- Creator of “plum pudding” model
- Atoms having the same number of protons, but different number of neutrons
- Groups 3 - 12 are called?
Down
- Who conducted the gold foil experiment?
- HNO2
- Group 7A elements are called?
- CO
- MnO4-
- force of attraction between oppositely charged atoms is an ____ bond
- Prefix for seven
- CH4+
- Shiny, ductile, and conductive
- A negatively charged ion
17 Clues: CO • HNO2 • CH4+ • HCO3- • MnO4- • Prefix for four • Prefix for seven • A positively charged ion • A negatively charged ion • Groups 3 - 12 are called? • Group 7A elements are called? • Shiny, ductile, and conductive • Creator of “plum pudding” model • Who conducted the gold foil experiment? • Elements on the right side of the periodic table • ...
7 ⚛️ Atoms & Periodic Table 👩🏫 2024-05-28
Across
- - a subatomic particle that has no charge and that is found in the nucleus of an atom
- - the average mass of all the isotopes of an element
- - _______ electron is an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties
- - a horizontal row of elements in the periodic table
- - the number of protons in the nucleus of an atom
- - an atom with the same number of protons and a different number of neutrons from other atoms of the same element
- - A subatomic particle that has a negative charge
Down
- - the center of an atom, which contains the protons and neutrons
- - an atom or group of atoms that has a positive or negative charge
- - the basic unit of a chemical element
- - electron ______ is a region around the nucleus of an atom where electrons are likely to be found
- - a vertical column of elements in the periodic table
- - a positively charged subatomic particle
13 Clues: - the basic unit of a chemical element • - a positively charged subatomic particle • - the number of protons in the nucleus of an atom • - A subatomic particle that has a negative charge • - the average mass of all the isotopes of an element • - a horizontal row of elements in the periodic table • - a vertical column of elements in the periodic table • ...
PHYSICAL SCIENCE 8 2023-05-23
Across
- 3 quarks, one up quark, and 2 down quarks and many many "intermediate particles" called gluons
- are called PERIODS and the columns are called GROUPS.
- protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- chemical element with symbol O and atomic number 8.
- basic unit of a chemical element.
- a substance made from two or more different elements that have been chemically joined.
- type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Down
- of elements
- a column in the periodic table of the chemical elements.
- A small particle with a negative charge that is found in all atoms.
- substance made of only 1 type of atom that can not be broken down further into other substances.
- the interior of the cell from the outside environment.
- a subatomic particle with a positive electric charge.
13 Clues: of elements • basic unit of a chemical element. • chemical element with symbol O and atomic number 8. • are called PERIODS and the columns are called GROUPS. • a subatomic particle with a positive electric charge. • the interior of the cell from the outside environment. • a column in the periodic table of the chemical elements. • ...
PHYSICAL SCIENCE 8 2023-05-23
Across
- 3 quarks, one up quark, and 2 down quarks and many many "intermediate particles" called gluons
- are called PERIODS and the columns are called GROUPS.
- protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- chemical element with symbol O and atomic number 8.
- basic unit of a chemical element.
- a substance made from two or more different elements that have been chemically joined.
- type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Down
- of elements
- a column in the periodic table of the chemical elements.
- A small particle with a negative charge that is found in all atoms.
- substance made of only 1 type of atom that can not be broken down further into other substances.
- the interior of the cell from the outside environment.
- a subatomic particle with a positive electric charge.
13 Clues: of elements • basic unit of a chemical element. • chemical element with symbol O and atomic number 8. • are called PERIODS and the columns are called GROUPS. • a subatomic particle with a positive electric charge. • the interior of the cell from the outside environment. • a column in the periodic table of the chemical elements. • ...
~~~Madison Spaulding~~~CHAPTER 9 CROSSWORD~~~ 2021-10-13
Across
- Fluorine, chlorine, Iodine
- Carbon, Silicon
- Oxygen, Sulfur, Selenium
- Boron, Aluminum
- Indicates # of energy levels
- creator of the periodic table
- Helium, Neon, Argon, Krypton, XENON
- Indicates valance electrons
Down
- Nitrogen, Phosphorous, Bismuth
- Lithium, Hydrogen
- Calcium, Magnesium
11 Clues: Carbon, Silicon • Boron, Aluminum • Lithium, Hydrogen • Calcium, Magnesium • Oxygen, Sulfur, Selenium • Fluorine, chlorine, Iodine • Indicates valance electrons • Indicates # of energy levels • creator of the periodic table • Nitrogen, Phosphorous, Bismuth • Helium, Neon, Argon, Krypton, XENON
puzzle 1.1 2022-04-20
Across
- 1940s-1950s actor
- 1st element on the periodic table of elements
- an other word for shot
- popular word game
- russian ally
- zero degrees Fahrenheit to celcius
Down
- country in africa
- star wars antagonist
- Country wordle knockoff
- robbery
- disease caused by not having enough vitamin c
11 Clues: robbery • russian ally • 1940s-1950s actor • country in africa • popular word game • star wars antagonist • an other word for shot • Country wordle knockoff • zero degrees Fahrenheit to celcius • 1st element on the periodic table of elements • disease caused by not having enough vitamin c
science 2022-07-18
Across
- used to make steel
- acids and...
- made up of one type of atom
- separating two liquids
- sleep up digestion process
- property of a metal
Down
- type of fossil fuel
- chemical reaction in plants
- a state of matter
- horizontal row in the periodic table
- H2O
11 Clues: H2O • acids and... • a state of matter • used to make steel • type of fossil fuel • property of a metal • separating two liquids • sleep up digestion process • chemical reaction in plants • made up of one type of atom • horizontal row in the periodic table
Chemistry vocabulary 2021-10-27
Across
- An atom that has lost one or more electrons. A positively charged ion.
- principle: The aufbau principle states that in the ground state (Links to an external site.) of an atom or ion, electrons (Links to an external site.) fill atomic orbitals (Links to an external site.) of the lowest available energy levels (Links to an external site.) before occupying higher levels.
- affinity: The change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom's likelihood of gaining an electron.
- gases: Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known. All noble gases have full valance orbitals.
- elements: All elements in the s and p blocks of the periodic table. The most abundant elements in the periodic table.
- configuration: A simplified version of electron configuration.
- radius: The measure of the size of the atom. The larger the atomic radius the larger the size of the atom.
- energy: The amount of energy required to remove an electron from a gaseous atom or ion.
Down
- The measure of how hard an atom hold onto its electrons.
- configuration: The distribution of the electrons of an atom in the atom's orbitals.
- exclusion principle: The quantum mechanical principle which states that two or more identical electrons cannot occupy the same quantum state within a quantum system simultaneously.
- The measure of the ease with which an electricity can pas through a material.
- Metal families: Alkali metals, Alkali earth metals, Inner transition metal (actinides and lanthanides), transition metals, post- transition metals, metalloids: Follow link.
- rule: Every suborbital of a orbital is singly occupied with one electron before any one suborbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.
- law: the physical and chemical properties of the elements recur in a systematic and predictable way when the elements (Links to an external site.)are arranged in order of increasingatomic number (Links to an external site.).
- Any chemical element that is an effective conductor of electricity and heat can be defined as a metal. A metal is also good at forming bonds and cations with non-metals. Atoms inside of a metal quickly lose electrons in order to make positive ions or cations. The ions in turn are surrounded by the electrons that are delocalized, which give the metal its electric conductivity.
- Nonmetal, substance that does not exhibit such characteristic properties ofmetals as hardness, mechanical adaptability, or the ability to conduct electricity.
- notation: Orbital notation is a way of writing an electron configuration to provide more specific information about the electrons in an atom of an element. Orbital notation can be used to determine the quantum numbers of an electron.
- An atom that has gained one or more electrons. A negatively charged ion.
19 Clues: The measure of how hard an atom hold onto its electrons. • configuration: A simplified version of electron configuration. • An atom that has lost one or more electrons. A positively charged ion. • An atom that has gained one or more electrons. A negatively charged ion. • The measure of the ease with which an electricity can pas through a material. • ...
1st week crossword puzzle 2023-04-09
Across
- valency of oxygen is
- in periodic table we find
- circular path present around the nucleus
- combining capacity
- can not exist independently
- negative charge particle of a atom is
- atoms combine to form
- total number of protons
- elements combines to form
Down
- central part of atoms is
- shape of atom
- can exist independently
- short hand notation of element is
- matter exist in
- revolving around the nucleus
- can not be divided further
16 Clues: shape of atom • matter exist in • combining capacity • valency of oxygen is • atoms combine to form • can exist independently • total number of protons • central part of atoms is • in periodic table we find • elements combines to form • can not be divided further • can not exist independently • revolving around the nucleus • short hand notation of element is • ...
Puzzle 23 2025-03-10
Across
- - Display the manual for commands
- - Manage Btrfs filesystems
- - Terminate processes by PID
- - Output text to the console
- - Format text for printing
- - Schedule periodic tasks
- - Configure IP packet filter rules
- - Convert and copy a file
- - Interactive process viewer
Down
- - Partition table manipulator for Linux
- - Query the APT cache
- - Search text using patterns
- - NCurses Disk Usage utility
- - Display information about CPU architecture
14 Clues: - Query the APT cache • - Schedule periodic tasks • - Convert and copy a file • - Manage Btrfs filesystems • - Format text for printing • - Terminate processes by PID • - Output text to the console • - Search text using patterns • - NCurses Disk Usage utility • - Interactive process viewer • - Display the manual for commands • - Configure IP packet filter rules • ...
Science Vocabulary Crossword 2017-11-30
Across
- the total number of protons and neutrons in a nucleus
- A period is the name given to a horizontal row of the periodic table.
- an element whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
- a product is a substance that is formed as the result of a chemical reaction
- a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- The law of conservation of mass states that mass is neither created nor destroyed. In a closed system, mass of reactants is equal to mass of products
- the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- A chemical formula tells us the number of atoms of each element in a compound
- a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
Down
- the basic unit of a chemical element.
- a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns
- a group is a column of elements in the periodic table of the chemical elements
- a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- The electron cloud is the region of negative charge surrounding an atomic nucleus that is associated with an atomic orbital
- Any rearrangement of electrons in two atoms that generates a force, causing the atoms to be bound to each other, forming a molecule.
- a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed
- an element or substance that is not a metal.
- a substance that takes part in and undergoes change during a reaction.
- a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids
- the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
20 Clues: the basic unit of a chemical element. • an element or substance that is not a metal. • the total number of protons and neutrons in a nucleus • A period is the name given to a horizontal row of the periodic table. • a substance that takes part in and undergoes change during a reaction. • a product is a substance that is formed as the result of a chemical reaction • ...
Chemistry Crossword 2017-11-08
Across
- Substances that help a reaction speed faster. They re not consumed during a chemical reaction.
- Use atomic number
- the average mass of an element in atomic mass units (AMU)
- A new substance produced in a chemical reaction between reactants
- When 2 or more substances react to form a new substance. It is irreversible.
- An element is defined by number of protons it has.
- An experiment where all reactants and all products of a chemical reaction are accounted for.
- When a material changes state but does not change composition(makeup). It is reversible.
- A reaction that takes place when two or more substances react to form new substances
- Group 2 elements in the periodic table; their reactivity is not as strong as that of the alkali metals
- combo of symbols that represent a compound; the formula identifies the elements in the compound and the amount of each element
- Use atomic number
- An experiement in which one or more products of a chemical reaction can escape.
Down
- Group 17 elements in the periodic table;the most reactive non-metals
- Most reactive family in the period table of elements
- Substance that reacts with another substance or substances in a chemical reaction to create new substances with different properties.
- A slow chemical change that occurs when oxygen in the air reacts with metal. _________ is a chemical reaction in which the metal is decomposed.
- Pure substance formed when at least one metal and one non-metal combine
- Mass number minus atomic number
- A chemical reaction that occurs when oxygen reacts with a substance to form a new substance and gives off energy.
- An atom that has become electrically charged because it has lost or gained electrons; a positive ion is an atom that has lost one or more electrons;a negative ion is an atom that has gained one or more electrons
- A chemical reaction that takes place in the cells of your body. Food (glucose) reacts with oxygen to produce energy,water, and carbon dioxide.
- When non-metals combine, they produce a pure substance called a molecule, or molecular compound.
- Group 18 elements in the periodic table;the most stable and nonreactive elements
24 Clues: Use atomic number • Use atomic number • Mass number minus atomic number • An element is defined by number of protons it has. • Most reactive family in the period table of elements • the average mass of an element in atomic mass units (AMU) • A new substance produced in a chemical reaction between reactants • ...
Matter and Change CH. 1 Vocab 2013-09-05
Across
- having a uniform composition throughout
- a pure substance made of only one kind of atom
- a substance that is made from the atoms of 2 or more elements that are chemically bonded
- the process of converting one substance into another substance
- The study of the composition, structure and properties of matter and the changes it undergoes
- a high temperature physical state of matter in which atoms lose their electrons
- a property that does not depend on the amount of matter present
- a measure of the amount of matter
- The smallest unit of an element that maintains the properties of that element
- an element that has some characteristics of metals and some characteristics of non metals
- anything that can be observed about a substance without changing its identity
- also a vertical column of the periodic table
- a substance that reacts in chemical change
- a change in substance that can be observed without changing chemical composition
- the state of matter in which the substance has a definite volume but an indefinite shape
- a homogeneous mixture of 2 or more substances in a single phase
Down
- a horizontal row of elements in the periodic table
- and element that is a poor conductor of heat and electricity
- not having a uniform composition throughout
- any substance that has a definite composition
- a substance that has a fixed composition and differs from a mixture in that every sample of a given pure substance has exactly the same characteristics, properties and composition
- a property that depends on the amount of matter that is present
- anything that has mass and takes up space
- The ability to undergo chemical reactions that transform the item into a different substance
- an element that is a good conductor of heat and electricity
- a reaction in which one or more substances are converted into different substances
- a blend of 2 or more kinds of matter, each of which retains its own identity and properties
- a substance that is formed by a chemical change
- a vertical column of the periodic table
- the state of matter in which a substance has neither definite volume nor definite shape
- the state of matter in which the substance has definite volume and definite shape
31 Clues: a measure of the amount of matter • having a uniform composition throughout • a vertical column of the periodic table • anything that has mass and takes up space • a substance that reacts in chemical change • not having a uniform composition throughout • also a vertical column of the periodic table • any substance that has a definite composition • ...
Unit 2 2014-11-07
Across
- / The amount of time required for one complete cycle of a periodic event or waveform.
- D Flip-Flop / Type of flip-flop in which the D (data) input is the synchronous input.
- (Hz) / Unit of frequency. One hertz equals one cycle per second.
- Delays (tPLH/tPHL) / Delay from the time a signal is applied to the time when the output makes its change.
- / TTL-compatible IC that can be wired to operate in several different modes, such as a one-shot and an astable multivibrator.
- / A sequential circuit based on a latch whose output changes when its CLOCK input receives a pulse.
- Waveform / A series of logic 1s and 0s plotted as a function of time.
- In-Line Package (DIP) / One style of integrated circuit package which has two rows of lead.
- Diagram / A diagram, similar to a schematic, showing the connection of logic gates.
Down
- Wave / An almost instantaneous rise and decay of voltage or current in a periodic pattern with time and with a constant peak value.
- / Also called a NOT gate or an inverting buffer. A logic gate that changes its input logic level to the opposite state.
- Entry / A technique of entering CPLD design information by using a CAD (computer aided design) tool to draw a logic circuit as a schematic. The schematic can then be interpreted by design software to generate programming information for the CPLD.
- / A piece of test equipment used to view and measure a variety of different waveforms.
- Edge / The part of a pulse where the logic level is in transition from a HIGH to a LOW.
- Wave / One in which amplitude varies in proportion to the sine function of an angle.
- Expression / An algebraic expression made up of Boolean variables and operators, such as AND (-), OR (+), or NOT (-). Also referred to as Boolean function or a logic function.
- Circuit (IC) / An electronic circuit having many components, such as transistors, diodes, resistors, and capacitors, in a single package.
- / The instantaneous voltage of a waveform. Often used to mean maximum amplitude, or peak voltage, or a pulse.
- / The number of cycles per unit time of a periodic waveform.
- Cycle (DC) / Fraction of the total period that a digital waveform is in the HIGH state. DC = th/T (often expressed as a percentage: %DC = th/Tx100%).
20 Clues: / The number of cycles per unit time of a periodic waveform. • (Hz) / Unit of frequency. One hertz equals one cycle per second. • Waveform / A series of logic 1s and 0s plotted as a function of time. • Diagram / A diagram, similar to a schematic, showing the connection of logic gates. • ...
Lesson 1.2 Introduction to Circuit Design-No Spaces 2015-09-13
Across
- TTL-compatible IC that can be wired to operate in several different modes, such as a one-shot and an astable multivibrator.
- Fraction of the total period that a digital waveform is in the HIGH state. DC = th/T (often expressed as a percentage: %DC = th/Tx100%).
- A diagram, similar to a schematic, showing the connection of logic gates.
- Delay from the time a signal is applied to the time when the output makes its change.
- Type of flip-flop in which the D (data) input is the synchronous input.
- A sequential circuit based on a latch whose output changes when its CLOCK input receives a pulse.
- One in which amplitude varies in proportion to the sine function of an angle.
- One style of integrated circuit package which has two rows of lead.
- The amount of time required for one complete cycle of a periodic event or waveform.
- Also called a NOT gate or an inverting buffer. A logic gate that changes its input logic level to the opposite state.
- A technique of entering CPLD design information by using a CAD (computer aided design) tool to draw a logic circuit as a schematic. The schematic can then be interpreted by design software to generate programming information for the CPLD.
- Unit of frequency. One hertz equals one cycle per second.
Down
- An electronic circuit having many components, such as transistors, diodes, resistors, and capacitors, in a single package.
- A piece of test equipment used to view and measure a variety of different waveforms.
- An almost instantaneous rise and decay of voltage or current in a periodic pattern with time and with a constant peak value.
- The part of a pulse where the logic level is in transition from a HIGH to a LOW.
- A series of logic 1s and 0s plotted as a function of time.
- The number of cycles per unit time of a periodic waveform.
- The instantaneous voltage of a waveform. Often used to mean maximum amplitude, or peak voltage, or a pulse.
- Expression An algebraic expression made up of Boolean variables and operators, such as AND (-), OR (+), or NOT (-). Also referred to as Boolean function or a logic function.
20 Clues: Unit of frequency. One hertz equals one cycle per second. • A series of logic 1s and 0s plotted as a function of time. • The number of cycles per unit time of a periodic waveform. • One style of integrated circuit package which has two rows of lead. • Type of flip-flop in which the D (data) input is the synchronous input. • ...
Ch 7 Review CW 1 2021-03-08
Across
- the number of valence electrons in the Oxygen Family
- family of elements located in Group 2
- type of property that describes the characteristic of matter that you can observe or measure without changing the identity of the matter
- family of elements with seven valence electrons
- the number of valence electrons in the Nitrogen Family
- family of elements with four valence electrons
- a column on the periodic table
- ability of one substance to dissolve in another
- the number of valence electrons for each element in Group 1
- all the elements in a row have the same number of _____________
- type of mixture in which the individual substances are not evenly mixed
- family of elements located in Group 1, not including hydrogen
- family of elements located with eight valence electrons
- family of elements with five valence electrons
- the family of elements with six valence electrons
- characteristic used to describe something
- matter that can vary in composition
- the number of valence electrons in the Carbon Family
Down
- matter with a composition that is always the same
- anything that has mass and takes up space
- to form a solution by mixing evenly
- family of elements located in the middle of periodic table
- substance that consists of just one type of atom
- small particle that is a building block of matter
- type of property that describes the characteristic of matter that can be observed as it changes to a different type of matter
- type of mixture in which the individual substances are evenly mixed
- the number of valence electrons for each element in the Boron Family
- family of elements with three valence electrons
- amount of matter in an object
- substance containing atoms of two or more different elements chemically bonded together
- a row on the periodic table
- number of valence electrons for each element in Group 2
- having nothing else like it
- number of valence electrons in the Noble Gases Family
- amount of substance in a certain volume
- force between atoms or groups of atoms
- mass per unit volume of a substance
- the number of valence electrons in the Halogen Family
38 Clues: a row on the periodic table • having nothing else like it • amount of matter in an object • a column on the periodic table • to form a solution by mixing evenly • mass per unit volume of a substance • matter that can vary in composition • family of elements located in Group 2 • force between atoms or groups of atoms • amount of substance in a certain volume • ...
Year 8 Chemistry 2023-09-18
Across
- A group of atoms bonded together, representing the smallest unit of a chemical compound that retains its chemical properties.
- The property of a material that allows it to be easily deformed or shaped without breaking when subjected to pressure or compression.
- The property of a material that allows it to be stretched or drawn into thin wires or threads without breaking.
- The tendency of a material to break or shatter easily when subjected to stress or impact, without significant deformation.
- A vertical column on the periodic table, consisting of elements with similar chemical properties due to the same number of electrons in their outermost energy level.
- A subatomic particle found in the nucleus of an atom, carrying a positive electric charge (+1).
- A horizontal row on the periodic table, indicating the number of electron energy levels in the atoms of the elements within that row.
- The measure of a material's resistance to being scratched or indented. It describes how well a substance can withstand abrasion.
- A subatomic particle that orbits the nucleus of an atom and carries a negative electric charge (-1).
- The ability of a material to conduct or transfer heat energy when exposed to a temperature difference.
Down
- Referring to elements or compounds consisting of single atoms, not bonded to each other.
- The measure of the mass of a substance per unit volume. It determines how tightly packed the particles are within a material.
- The visual property that describes the appearance of an object due to the wavelengths of light it reflects or emits.
- The temperature at which a liquid substance changes into a vapor or gas state.
- The visual property that describes the way light interacts with the surface of a material, giving it a shiny or dull appearance.
- A subatomic particle found in the nucleus of an atom, having no electric charge (neutral).
- A substance formed when two or more different elements chemically combine in fixed proportions to create a new substance with distinct properties.
- A pure substance composed of only one type of atom, characterized by its atomic number and represented on the periodic table.
- The temperature at which a solid substance changes into a liquid state.
- A regular, repeating three-dimensional pattern or arrangement of atoms, ions, or molecules in a crystal or solid structure.
20 Clues: The temperature at which a solid substance changes into a liquid state. • The temperature at which a liquid substance changes into a vapor or gas state. • Referring to elements or compounds consisting of single atoms, not bonded to each other. • A subatomic particle found in the nucleus of an atom, having no electric charge (neutral). • ...
Extra Credit Chemistry Crossword Puzzle 2025-03-27
Across
- What term is used to describe atoms or ions that have the same number of electrons and, therefore, the same electronic configuration?
- This formula of a chemical compound is the simplest whole number ratio of atoms present in a compound.
- The term for a negatively charged ion, when an atom gains one or more electrons?
- What group of elements on the periodic table are known for being highly reactive and form salt when combined with metals?
- A term describing a group of elements in the periodic table, that are highly reactive. EX: Sodium, Lithium
- Table- What is the chart that organizes the chemical elements?
- Which particle, alongside protons, helps to stabilize the nucleus of an atom and is essential for the formation of isotopes?
- What is it called when two or more elements chemically combined?
- What is the term that is described as shiny, conductive, and malleable? EX: Copper, Iron, Gold
- What is the smallest unit of matter that retains the properties of an element, consisting of a nucleus surrounded by electrons?
- What subatomic particle has a negative charge and orbits the nucleus of an atoms?
Down
- What term is used to describe a positively charged ion that has lost one or more electrons?
- What is the principle that explains why atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration similar to that of noble gases?
- What term describes ions that consist of more than one atom and carry a charge, often found in various chemical compounds?
- The bond between two atoms, where electrons are shared to achieve stability is called___?
- - A group of two or more atoms bonded together representing the smallest unit of a chemical compound
- What term is used to describe a solution in which water is the solvent, often found in chemistry and biology?
- What term describes a material's ability to be stretched into a wire without breaking, often used in reference to metals?
- What term is used to describe an atom or molecule that has gained or lost one or more electrons, resulting in a net electric charge?
- What subatomic particle, found in the nucleus of an atom, carries a positive charge and plays a key role in determining the identity of an element?
20 Clues: Table- What is the chart that organizes the chemical elements? • What is it called when two or more elements chemically combined? • The term for a negatively charged ion, when an atom gains one or more electrons? • What subatomic particle has a negative charge and orbits the nucleus of an atoms? • ...
Chemistry 2025-05-13
Across
- System What majority of the world uses for unit of measurements.
- To give off energy or substance.
- Electrons Amount of electrons in the outermost circle in an element.
- Determines how many valence electrons an element has on a periodic table.
- One of the forms of physical, often used in day to day items. Can be touched.
- A positive charge in a nucleus.
- A positive or negative on a atom or compound.
- Number 6.023 x 10^23
- Analysis A way to go back and forth between different units of measure.
- Something made up of several substances or atoms. Often liquid.
- The negitave charge in an atom.
- Elements with the same number of protons but different number of neutrons.
- One of the three forms of physical, lakes, rivers and drinks are often made of it.
- Of Mass Mass can't be created or destoryed.
- Has the noble gas family and can't be seen with the naked eye.
- Mass Unit Unit of mass used to measure how heavy atoms are.
- The differnet forms that molecular structures can have. (Linear, Bent, and ect.)
- Theory 3 main parts, orintation, speed, and they collide.
Down
- Area The amount of area that is facng the outside world.
- Mass The total weight of a compound or an element.
- Energy that is used in magents, aberivated as EM.
- A substance gets taken in by another.
- Used to determine amount of atoms, grams or moles in a chemical reaction.
- One of the three forms of physical, often not visable to the naked eye.
- Something you can touch. Often atoms, liquid, solids.
- Takes up majority of the periodic table. They are often found in computers.
- Ratio Used in stoichiometry when going mole to mole.
- The substance that is created from adding solute and solvent together.
- Properties Phyiscal properties are changed by the concentration of particles.
- A way to group different elements on the periodic table.
- Ratio of moles in a solution. This uses liters as a base.
- How much concentraction there is.
- Difference sides of the PH scale.
- What brings two differnet atoms together, making them a compound.
- Has a neutral charge in an atom.
- Speeds up the reaction rates in a chemical reaction.
36 Clues: Number 6.023 x 10^23 • A positive charge in a nucleus. • The negitave charge in an atom. • To give off energy or substance. • Has a neutral charge in an atom. • How much concentraction there is. • Difference sides of the PH scale. • A substance gets taken in by another. • Of Mass Mass can't be created or destoryed. • A positive or negative on a atom or compound. • ...
Chemistry Vocab Review - Semester 1 2023-01-08
Across
- atoms of the same element that contain equal numbers of protons but different numbers of neutrons
- a bond between a nonmetal and a nonmetal
- a bond in a covalent compound where 2 pairs of electrons are shared
- elements that are generally solid, shiny, malleable, and good conductors of heat and electricity
- The rows in a periodic table that classify the elements by the number of atomic shells
- any substance that cannot be broken into simpler substances
- the smallest unit of matter
- a measure of the size of an atom, and is generally defined as the distance from the nucleus to the outermost electron
- a bond between a metal and a nonmetal
- a law that states that energy cannot be created nor destroyed
- columns on a periodic table that arrange the elements by the number of electrons that are in the outside shell
- the transfer of thermal energy
- subatomic particle that has mass but no charge
- positively charged subatomic particle
Down
- Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors
- the region surrounding the nucleus that contains electrons
- a bond in a covalent compound where 3 pairs of electrons are shared
- the energy required to remove an electron from an atom
- subatomic particle that has a negative charge
- the electrons located in the outermost energy level of an atom
- the tendency of an atom to attract electrons and acquire a negative charge
- a law that states that matter cannot be created nor destroyed
- the total kinetic energy of all the atoms or molecules of that substance
- the average kinetic energy of all the atoms or molecules of that substance
- elements that are generally not shiny, are usually gases or brittle solids, are not malleable, and are poor conductors of heat and electricity
- an atom with an electric charge due to the loss or gain of one or more electrons
- a bond in a covalent compound where only 1 pair of electrons is shared between atoms
- the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
- contains protons and neutrons
29 Clues: the smallest unit of matter • contains protons and neutrons • the transfer of thermal energy • a bond between a metal and a nonmetal • positively charged subatomic particle • a bond between a nonmetal and a nonmetal • subatomic particle that has a negative charge • subatomic particle that has mass but no charge • the energy required to remove an electron from an atom • ...
Chemistry Vocab Review - Semester 1 2023-01-08
Across
- atoms of the same element that contain equal numbers of protons but different numbers of neutrons
- a bond between a nonmetal and a nonmetal
- a bond in a covalent compound where 2 pairs of electrons are shared
- elements that are generally solid, shiny, malleable, and good conductors of heat and electricity
- The rows in a periodic table that classify the elements by the number of atomic shells
- any substance that cannot be broken into simpler substances
- the smallest unit of matter
- a measure of the size of an atom, and is generally defined as the distance from the nucleus to the outermost electron
- a bond between a metal and a nonmetal
- a law that states that energy cannot be created nor destroyed
- columns on a periodic table that arrange the elements by the number of electrons that are in the outside shell
- the transfer of thermal energy
- subatomic particle that has mass but no charge
- positively charged subatomic particle
Down
- Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors
- the region surrounding the nucleus that contains electrons
- a bond in a covalent compound where 3 pairs of electrons are shared
- the energy required to remove an electron from an atom
- subatomic particle that has a negative charge
- the electrons located in the outermost energy level of an atom
- the tendency of an atom to attract electrons and acquire a negative charge
- a law that states that matter cannot be created nor destroyed
- the total kinetic energy of all the atoms or molecules of that substance
- the average kinetic energy of all the atoms or molecules of that substance
- elements that are generally not shiny, are usually gases or brittle solids, are not malleable, and are poor conductors of heat and electricity
- an atom with an electric charge due to the loss or gain of one or more electrons
- a bond in a covalent compound where only 1 pair of electrons is shared between atoms
- the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
- contains protons and neutrons
29 Clues: the smallest unit of matter • contains protons and neutrons • the transfer of thermal energy • a bond between a metal and a nonmetal • positively charged subatomic particle • a bond between a nonmetal and a nonmetal • subatomic particle that has a negative charge • subatomic particle that has mass but no charge • the energy required to remove an electron from an atom • ...
Introduction of Periodic Table 2020-09-10
Across
- Inert Metal in Periodic Table
- Radioactive element
- last halogen in Periodic Table
Down
- more electronegative atom
- one of liquid of Halogen
- lighter gas than air
6 Clues: Radioactive element • lighter gas than air • one of liquid of Halogen • more electronegative atom • Inert Metal in Periodic Table • last halogen in Periodic Table
Period table 2018-11-12
Across
- 2 or more elements
- 1 carbon and 2 oxygen
- 48 22 on the periodic table
- makes balloons float
Down
- You inhale this
- good for your teeth
- highest on the reactive series
- found in sand
- found in toothpaste
- Na
10 Clues: Na • found in sand • You inhale this • 2 or more elements • good for your teeth • found in toothpaste • makes balloons float • 1 carbon and 2 oxygen • 48 22 on the periodic table • highest on the reactive series
Chapter 9 Woran Thompson 2019-09-10
Across
- has a positive charge
- has a neutral charge
- created the periodic table
- number of protons and neutrons
- has negative
Down
- groups
- periods
- number of protons
- to represent something in 3d
- made up of protons, electrons, and neutrons
10 Clues: groups • periods • has negative • number of protons • has a neutral charge • has a positive charge • created the periodic table • to represent something in 3d • number of protons and neutrons • made up of protons, electrons, and neutrons
Science Stuff 2013-04-25
Across
- Anagram - dnuopmoc
- Where the elemnts are kept
- Anagram - gdol
- These are kept in the periodic table
- symbol is K
Down
- A yellow substance
- Symbol is W
- These can be separated from sulphur
- Anagram - noitcaerlacimehc
- Symbol is O
10 Clues: Symbol is W • Symbol is O • symbol is K • Anagram - gdol • A yellow substance • Anagram - dnuopmoc • Anagram - noitcaerlacimehc • Where the elemnts are kept • These can be separated from sulphur • These are kept in the periodic table
Ven's Crossword #1 2023-03-07
Across
- easily broken
- Morally good; Righteous
- A piece of garlic
- Tenth element on the periodic table.
Down
- A semi-aquatic arctic animal
- Something to keep you awake
- Clump
- A light wind
- Someone who uses a bow
- very small
10 Clues: Clump • very small • A light wind • easily broken • A piece of garlic • Someone who uses a bow • Morally good; Righteous • Something to keep you awake • A semi-aquatic arctic animal • Tenth element on the periodic table.
KHELLO MY NAME IS BORGOF 2022-12-14
Across
- a bladder
- the periodic table
- This is what makes blood red
- the way things work
Down
- Higher pressure veins
- THE LIVER KING
- is what delivers oxygen
- part of your body
- blood canals
- the part that protects your body
10 Clues: a bladder • blood canals • THE LIVER KING • part of your body • the periodic table • the way things work • Higher pressure veins • is what delivers oxygen • This is what makes blood red • the part that protects your body
2702 wendy cross world puzzle 2025-11-27
Across
- The highest points of a transverse wave, where the displacement is at maximum positive amplitude.
- The maximum displacement of a wave or oscillating object from its equilibrium position, measured in meters (m). It represents the wave's intensity or energy.
- Motion: A motion that repeats itself at regular intervals, such as the swinging of a pendulum or the vibration of a tuning fork.
- (Hz): The SI unit of frequency, defined as one cycle per second (1 Hz = 1 s⁻¹).
Down
- A disturbance that travels through a medium or space, transferring energy without transferring matter. Waves can be transverse (e.g., light) or longitudinal (e.g., sound).
- (f): The number of cycles or oscillations per unit time, measured in hertz (Hz). It is related to period by f = 1/T.
- One complete round trip or oscillation of a periodic motion, from start to finish and back to the starting point.
- The lowest points of a transverse wave, where the displacement is at maximum negative amplitude.
- (T): The time taken for one complete cycle of a periodic motion, measured in seconds (s). It is the reciprocal of frequency (T = 1/f).
9 Clues: (Hz): The SI unit of frequency, defined as one cycle per second (1 Hz = 1 s⁻¹). • The lowest points of a transverse wave, where the displacement is at maximum negative amplitude. • The highest points of a transverse wave, where the displacement is at maximum positive amplitude. • ...
Someone to love crossword 2020-12-12
Across
- stare in an angry way
- occurring at intervals
- control or influence
- control or influence
- inspect(someone or something)
Down
- cautiously
- an artist who draws cartoons
- hold(something)dear
- with no hope
- point out
10 Clues: point out • cautiously • with no hope • hold(something)dear • control or influence • control or influence • stare in an angry way • occurring at intervals • an artist who draws cartoons • inspect(someone or something)
breanna huffman science crossword 2017-09-17
Across
- An extremely small, negatively charged subatomic particle found in a cloud outside the atomic nucleus
- An abbreviation for an element or atom
- A vertical column in the periodic table; also known as the family of elements
- Any material that is made up of only one type of atom
- A positively charged subatomic particle in the atomic nucleus
Down
- Any member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons
- An electrically neutral subatomic particle in the atomic nucleus
- A chart in which all known elements are listed in order of atomic number
- A count of the number of protons in the atomic nucleus
- Horizontal row on the periodic table
10 Clues: Horizontal row on the periodic table • An abbreviation for an element or atom • Any material that is made up of only one type of atom • A count of the number of protons in the atomic nucleus • A positively charged subatomic particle in the atomic nucleus • An electrically neutral subatomic particle in the atomic nucleus • ...
Chapter 10-Izzy Barkhimer 2019-03-25
Across
- Mass number decreases by 4, atomic number decreases by 2, and the resulting atom belongs to an element two places back in the periodic table.
- There is no change in mass number-no loss in nucleons, atomic number increases by 1, and the resulting atom belongs to an element one place forward in the periodic table.
- Is the process in which unstable atomic nuclei transform and emit radiation.
- High-energy particles and high-frequency electromagnetic radiation (gamma rays).
- How many types of radiation?
Down
- Carries no charge.
- Have an imbalance of neutrons and protons; are radioactive.
- Carries positive electric charge.
- There is no change in mass number and there is no change in atomic number.
- Carries negative electric charge.
10 Clues: Carries no charge. • How many types of radiation? • Carries positive electric charge. • Carries negative electric charge. • Have an imbalance of neutrons and protons; are radioactive. • There is no change in mass number and there is no change in atomic number. • Is the process in which unstable atomic nuclei transform and emit radiation. • ...
Biology Crossword Q1 2024-09-18
Across
- The study of living organisms.
- Another name for a biomolecule.
- Molecules that cannot be broken down into simpler substances.
- Another of the four molecules that is present in biomolecules and has the atomic number of 1.
Down
- One of the four molecules that are present in all biomolecules. Has the atomic number 6.
- Another of the four molecules that is present in biomolecules and has the atomic number of 15
- A molecule that makes up and is produced by a living organism.
- Atomic number 8 on the periodic table and one of the base elements that make up biomolecules.
- The basic unit of a chemical element.
- Atomic number 7 on the periodic table and one of the base elements that make up biomolecules.
10 Clues: The study of living organisms. • Another name for a biomolecule. • The basic unit of a chemical element. • Molecules that cannot be broken down into simpler substances. • A molecule that makes up and is produced by a living organism. • One of the four molecules that are present in all biomolecules. Has the atomic number 6. • ...
Periodic Table 2021-05-29
Across
- A substance that cannot be broken down into simpler substances by chemical means
- found in column 1 of the periodic table
Down
- colorless gases that are not reactive
- primary creator of the first periodic table
- a horizontal row of elements
- Has properties of both metals and nonmetal
6 Clues: a horizontal row of elements • colorless gases that are not reactive • found in column 1 of the periodic table • Has properties of both metals and nonmetal • primary creator of the first periodic table • A substance that cannot be broken down into simpler substances by chemical means
Periodic Table Scavenger Hunt 2022-09-29
Across
- 4 Neutrons, metal
- gas, 48 Neutrons
- Period 4, Lowest mass in period
- Period 6, Gas, 86 Protons
- nonmetals, Halogen family, atomic mass 35
- metal, Period 6, 56 Protons
- Period 5, Transitional Element, 51 Neutrons
- 26 Protons, Period 4, transitional element
- gas, atomic Mass 16, 8 Neutrons
Down
- mass Less than 30, Not Neon, Noble Gas
- 25 Electrons, Transition element
- 80 Electrons, Transitional Metal
- 29 Electrons, Period 4
- period 5, Metal, 38 Electrons
- period 4, Metal, 27 Electrons
- 12 Neutrons, Metallic, 11 Electrons
- Nonmetal, Period 3, Atomic Mass 32
- Metal, Period 4, 20 Electrons
- Atomic Mass 20, Gas
19 Clues: gas, 48 Neutrons • 4 Neutrons, metal • Atomic Mass 20, Gas • 29 Electrons, Period 4 • Period 6, Gas, 86 Protons • period 5, Metal, 38 Electrons • period 4, Metal, 27 Electrons • Metal, Period 4, 20 Electrons • metal, Period 6, 56 Protons • Period 4, Lowest mass in period • gas, atomic Mass 16, 8 Neutrons • 25 Electrons, Transition element • 80 Electrons, Transitional Metal • ...
chem 100 chapter 2 2022-05-25
Across
- A pure chemical substance, which cannot be broken down into simpler substances, consisting of a single type of atom.
- The number of protons and neutrons in an isotope.(2 words)
- An interaction between substances whereby electrons are rearrange, transferred, or shared.(2 words)
- The distance between the peak of one wave and the peak of the next wave.
- A vertical column of elements on the periodic table. Also called a family.
- A neutral particle within an atom's nucleus.
- Another term for light.(2 words)
- Specific wavelengths of emitted light that are characteristic of one element.(2 words)
- The lowest possible energy level that an electron can occupy in an atom.(2 words)
Down
- The number of protons in the nucleus of an atom.(2 words)
- Atoms of the same element that have different numbers of neutrons.
- The dense, positively charged region within an atom that contains protons and neutrons.
- An imaginary location that an electron can occupy in an atom.(2 words)
- A negatively charge particle within an atom.
- For an electron, any energy level higher in energy than its ground state.(2 words)
- A horizontal row of elements on the periodic table.
16 Clues: Another term for light.(2 words) • A negatively charge particle within an atom. • A neutral particle within an atom's nucleus. • A horizontal row of elements on the periodic table. • The number of protons in the nucleus of an atom.(2 words) • The number of protons and neutrons in an isotope.(2 words) • ...
States of Matter 2023-11-10
Across
- When matter is heated and expands,When it cools it contracts
- a negatively charged subatomic particle that can be either bound to an atom or free.
- a substance that is in a gaseous, or vaporous, state of matter
- anything that takes up space and can be weighed
- solid, liquid, gas, and plasma.
- made up of proton, neutrons, and electrons
- the number of a chemical element in the periodic system and on the periodic table that equals the number of protons in the nucleus of the atom
- a measure of the amount of matter in an object
Down
- large particle with no change found in the nucleus of an atom.
- when matter changes from one state (solid, liquid, gas, plasma) to another
- All matter is made up of particles which are in constant motion
- a short notation of one or two letters representing an element.
- A state of matter which has a fixed shape, mass, and volume
- the only state with a definite volume but no fixed shape
- the quantity of matter contained in an atom of an element.
- A substance that cannot be broken down into simpler substances by chemical means
16 Clues: solid, liquid, gas, and plasma. • made up of proton, neutrons, and electrons • a measure of the amount of matter in an object • anything that takes up space and can be weighed • the only state with a definite volume but no fixed shape • the quantity of matter contained in an atom of an element. • A state of matter which has a fixed shape, mass, and volume • ...
Atoms revision 2025-11-10
Across
- Number – The number of protons in the nucleus of an atom.
- – A substance made when two or more elements join chemically.
- – A negatively charged particle that moves around the nucleus in shells.
- Gases – Unreactive gases found in Group 0 (e.g. helium, neon, argon).
- – A pure substance made of only one type of atom.
- Metals – Elements in Group 1 that are very reactive metals (e.g. sodium, potassium).
- – A particle with no charge found in the nucleus.
Down
- – Reactive non-metals found in Group 7 (e.g. chlorine, bromine, iodine).
- – An element that conducts heat and electricity, is shiny, and can be shaped.
- – An element that is dull, often a gas, and does not conduct heat or electricity well.
- – The centre of the atom containing protons and neutrons.
- – A positively charged particle found in the nucleus of an atom.
- – Two or more substances combined but not chemically joined.
- – A column in the periodic table; elements in the same group have similar properties and the same number of outer electrons.
- – A row in the periodic table; elements in the same period have the same number of electron shells.
- – The smallest particle of a substance that cannot be seen with the naked eye.
16 Clues: – A pure substance made of only one type of atom. • – A particle with no charge found in the nucleus. • Number – The number of protons in the nucleus of an atom. • – The centre of the atom containing protons and neutrons. • – Two or more substances combined but not chemically joined. • – A substance made when two or more elements join chemically. • ...
Chemical elements 2022-10-28
Across
- Chemical element from the group of alkaline earths in the periodic table.
- In the gaseous state, its referred to as water vapor.
- Also called saccharides or just sugars.
- Is increasingly used as an ingredient in mineral fertilizers.
- Non-metal from the group of aerobes in the periodic table.
- They account for 10% of the chemical compounds in humans.
- Elements elements that are essential for life, because the body uses them to build its structures and uses them in metabolic processes.
- A chemical element or a chemical compound created in nature as a result of natural geological or cosmological processes, has a crystalline structure.
- Elements that occur in the body in large amounts(they constitute 0.01% or more of its dry mass).
Down
- The chemical element of atomic number 6.
- ......... acids Organic chemical compounds, biopolymers made of nucleotides.
- Is involved in the transport of calcium and potassium ions across cell membranes.
- They are found in all living organisms and viruses, the basic building block of the organism.
- The smallest functional part of a living organism.
- Is an essential element involved in the production of thyroid hormones.
- Part of a multicellular organism with a specific structure and function.
16 Clues: Also called saccharides or just sugars. • The chemical element of atomic number 6. • The smallest functional part of a living organism. • In the gaseous state, its referred to as water vapor. • They account for 10% of the chemical compounds in humans. • Non-metal from the group of aerobes in the periodic table. • ...
Waves Gone Wild Crossword Puzzle 2022-01-31
Across
- a wave that is an oscillation of matter
- a wave that moves away from the boundary
- the transfer of the energy of a wave to matter as the wave passes through it
- waves consisting of a periodic disturbance that takes place in the same direction as the advance of the wave
- how often the particles of the medium vibrate when a wave passes through the medium
- a propagating dynamic disturbance of one or more quantities
- the lower part of a wave
- a motion in which all points on a wave oscillate along paths at right angles
- one of the waves that are propagated by simultaneous periodic variations
Down
- involves a change in the direction of waves as they pass
- the horizontal line in the middle of a wave
- waves hitting the beach usually give of their energy to the sand
- a unique in that the wave energy is generally deflected in multiple directions
- the distance between successive crests of a wave
- the highest point of a wave
- the maximum distance moved by a point on a vibrating wave, measured from its equilibrium position
16 Clues: the lower part of a wave • the highest point of a wave • a wave that is an oscillation of matter • a wave that moves away from the boundary • the horizontal line in the middle of a wave • the distance between successive crests of a wave • involves a change in the direction of waves as they pass • a propagating dynamic disturbance of one or more quantities • ...
Math 2024-01-19
Across
- Value - amount after 4 years that the lender receives from the borrower
- - a person that loans money
- Interest - interest is computed on the principle
- Date - date on which money the money borrowed or loan
- Annuity - interest conversion or compounding period is equal or the same as the payment interval
- - amount of money borrowed or invested
- Annuity - the periodic payment is not made at the beginning nor at the end of each payment interval, but some later date
- - amount paid or earned for the use of money
Down
- Date - date on wich money is received by the borrower
- Annuity - annuity in which the periodic payment is made at the end of each payment interval.
- - a person who owes the money
- - fixed sum of money paid to someone at regular Intervals
- Value of an annuity - is the total accumulation of the payments and interest earned
- Annuity - interest conversion or compounding period is unequal or not the same as the payment interval
- Value of an annuity - is the principal that must be invested today to provide the regular payments of an annuity.
- - usually in percent, charge by the lender
16 Clues: - a person who owes the money • - a person that loans money • - amount of money borrowed or invested • - amount paid or earned for the use of money • - usually in percent, charge by the lender • Interest - interest is computed on the principle • Date - date on which money the money borrowed or loan • ...
F3 Chemistry Exam revision 2026-01-12
Across
- The number of 12C atoms in 12g of 12C (6.02x1023)
- Number written in front of formulae in a balanced chemical equation.
- In chemistry, the __________ is a unit of the amount of substance.
- In the formula of Ca(OH)2, it shows 1 __________.
- The mass of 1 mole of a substance.
- A vertical column in the Periodic Table. All elements in the same vertical column have the same number of outer shell electrons.
- A horizontal row in the Periodic Table. All elements in the same row have the same number of occupied shells.
- In the formula of Ca(OH)2, it shows 2 __________.
Down
- It is the same as atomic number.
- The adsorbent paper from paper chromatography showing the separation of different coloured substances.
- The mass of solute which must dissolve in 100 g of solvent to form a saturated solution at a particular temperature.
- The Group 0 elements are known as the __________ because they are almost completely unreactive.
- All chemical equations must be __________.
- The state symbol (aq) shows the __________ solution.
- The number of __________ in an atom = mass number – atomic number
- Liquids (or gases) which can mix with each other and form a homogenous mixture.
16 Clues: It is the same as atomic number. • The mass of 1 mole of a substance. • All chemical equations must be __________. • The number of 12C atoms in 12g of 12C (6.02x1023) • In the formula of Ca(OH)2, it shows 1 __________. • In the formula of Ca(OH)2, it shows 2 __________. • The state symbol (aq) shows the __________ solution. • ...
8F Review 2020-12-13
Across
- - A vertical column of elements in the periodic table. Elements in the same group generally have similar properties.
- - Able to be beaten and bent into shape.
- - A description of how quickly or vigorously something reacts.
- - Any element that is not shiny, and does not conduct heat and electricity well.
Down
- - When a liquid turns into a solid.
- - Not easily bent, not flexible, breaks under force.
- - A horizontal row in the periodic table.
7 Clues: - When a liquid turns into a solid. • - Able to be beaten and bent into shape. • - A horizontal row in the periodic table. • - Not easily bent, not flexible, breaks under force. • - A description of how quickly or vigorously something reacts. • - Any element that is not shiny, and does not conduct heat and electricity well. • ...
Periodic Table Crossword 2016-05-01
Across
- A vertical column of elements in the periodic table.
- number The number of protons in an element's nucleus.
- An element that has properties of both a metal and non-metal.
- The elements that are good conductors of heat and electricity.
Down
- The elements that are usually poor conductors of heat and electricity.
- number The total number of protons and neutrons in the nucleus of an atom.
- symbol Usually consists of a one or two letter abbreviation of the element name.
- A horizontal row of elements in the periodic table.
8 Clues: A horizontal row of elements in the periodic table. • A vertical column of elements in the periodic table. • number The number of protons in an element's nucleus. • An element that has properties of both a metal and non-metal. • The elements that are good conductors of heat and electricity. • The elements that are usually poor conductors of heat and electricity. • ...
Mya Gilson Week 6 Vocabulary 2022-09-19
Across
- In chemistry,a horizontal row of elements in the periodic table.
- An element that has properties of both metals and nonmetals.
- A one,two,or three letter abbreviation of the name of an element
Down
- The weighted average of the masses of all naturally accurate isotopes of an element
- A vertical column of elements in the periodic table.
- An element that conducts heat and electricity poorly
- An arrangement of the element in order of their atomic numbers
- An element that is shiny and that conduct heat and electricity well
8 Clues: A vertical column of elements in the periodic table. • An element that conducts heat and electricity poorly • An element that has properties of both metals and nonmetals. • An arrangement of the element in order of their atomic numbers • In chemistry,a horizontal row of elements in the periodic table. • ...
The Knee Knowledge Quest 2024-04-12
Across
- A compound used to treat diseases
- Physical trait for bending easily
- Midsection of your leg
- Element MG on the periodic table
- MedicalRehabilitationr treatment.
- Recovery program after injury
- Homosapian
Down
- Bone at the end of the heel
- Physical activity for health
- Branch of medicine focusing on bones and muscles
- Medication delivery via needle
- Anterior Cruciate Ligament
- Personal protective equipment
- Vitamin found in oranges
- Connective tissue that stabilFlexibilitys
- Ouch! It's a sports setback
16 Clues: Homosapian • Midsection of your leg • Vitamin found in oranges • Anterior Cruciate Ligament • Bone at the end of the heel • Ouch! It's a sports setback • Physical activity for health • Personal protective equipment • Recovery program after injury • Medication delivery via needle • Element MG on the periodic table • A compound used to treat diseases • Physical trait for bending easily • ...
DEFINITION 2025-12-17
Across
- A mixture of two or more elements according to a certain percentage with the main element being a metal.
- Smallest particle of an element that took place in chemical reaction.
- The amount of solute in a unit volume of solution.
- Chemical formula that shows the actual number of atoms of each element in a molecule of a compound
- Vertical columns in the Periodic Table of Elements.
Down
- Number of proton in nucleus of an atom.
- Horizontal rows in the Periodic Table of Elements.
- Atoms of the same element that have same number of proton but different number of neutron
- Particle that have charges either positive or negative
- Chemicals that ionize in water to produce hydrogen ions, H+.
- Chemical that consist that consist two or more element that chemically combined.
- A chemical that partially ionizes in water to produce a low concentration of hydroxide ions
- Field of science that studies the structures, properties, compositions and interactions between matters.
13 Clues: Number of proton in nucleus of an atom. • Horizontal rows in the Periodic Table of Elements. • The amount of solute in a unit volume of solution. • Vertical columns in the Periodic Table of Elements. • Particle that have charges either positive or negative • Chemicals that ionize in water to produce hydrogen ions, H+. • ...
general knowledge 2021-11-28
Across
- ! meaning in maths
- simplest element
- rarest lobster colour
- latest covid varient
- oldest species still alive
- largest black hole
- most common full name
Down
- most expensive element per gram
- 3rd tallest mountain
- most searched word on google
- latest addition to the periodic table
- founder of bunnings
- capital of syria
- another word for water bears
- antimatter version of an electron
- most sold board game
- only country with a $7 note
- closest solar system to ours
- longest word with one vowel
19 Clues: simplest element • capital of syria • ! meaning in maths • largest black hole • founder of bunnings • 3rd tallest mountain • most sold board game • latest covid varient • rarest lobster colour • most common full name • oldest species still alive • only country with a $7 note • longest word with one vowel • most searched word on google • another word for water bears • ...
Dads Crossword 4 2013-08-20
Across
- Author of Cocaine nights
- Second highest mountain (On Earth, Above sea level)
- A noble gas
- Black cougar
- The eighth power of 1000
- Ring that is not worn
- The protagonist of Catch-22
- Currency of Dubai
- Inventor of modern periodic table
Down
- First mortal women in Greek mythology
- 6th biggest country
- Pete Townshend's first wife
- Close relative is biggest invertebrate
- Refractive error in the eye
- Examples of these are solder, pewter and amalgam
- Fizzy drink
- Pacific island
- Arsenal's first professional manager (1897)
- The Flintstones pet
19 Clues: A noble gas • Fizzy drink • Black cougar • Pacific island • Currency of Dubai • 6th biggest country • The Flintstones pet • Ring that is not worn • Author of Cocaine nights • The eighth power of 1000 • Pete Townshend's first wife • Refractive error in the eye • The protagonist of Catch-22 • Inventor of modern periodic table • First mortal women in Greek mythology • ...
Chemistry Vocabulary 2021-12-08
Across
- Atomic mass unit
- number of molecules
- Go up and down (columes)
- 3rd ring
- no new substance
- More reactive
- properties of metals and nonmetals
- In nucleus,no charge
- Electricity and heat doesn't pass through
- Found on the left side of the periodic table
Down
- new substance
- 2 Nacl
- can be pulled into wire
- Can be bent or hammered into a sheet
- is the smallest part of an matter
- tell how many atoms
- Electrons cloud,negative
- not shinny
- More stable
19 Clues: 2 Nacl • 3rd ring • not shinny • More stable • new substance • More reactive • Atomic mass unit • no new substance • number of molecules • tell how many atoms • In nucleus,no charge • can be pulled into wire • Go up and down (columes) • Electrons cloud,negative • is the smallest part of an matter • properties of metals and nonmetals • Can be bent or hammered into a sheet • ...
Chemical Crossword! 2018-03-13
Across
- a change; new substance forms
- physically, not chemically combined
- where products get their atoms
- found in the periodic table
- elements chemically combined
- formed from reactants
- are broken in a chemical reaction
- no atoms are added or ___
- chemical ___ represents an element
Down
- atom __ = to # of protons or electrons
- The basic building block of matter
- a change; properties stay the same
- negatively charged particles
- The centre of an atom
- positively charged particles
- neutral subatomic particles
- protons plus neutrons = atomic ____
17 Clues: The centre of an atom • formed from reactants • no atoms are added or ___ • found in the periodic table • neutral subatomic particles • negatively charged particles • elements chemically combined • positively charged particles • a change; new substance forms • where products get their atoms • are broken in a chemical reaction • The basic building block of matter • ...
MS Agriculture 8/15 2024-08-15
Across
- capitol of Kentucky
- makes us sneeze in the spring
- another term for customer
- another term for horse
- the food we eat gives us this
- plants grow here
- plants that do not lose their leaves
- represented by C on the periodic table
- refers to milk
Down
- Blue grass state
- genetically modified organism
- county seat of Bourbon
- the absence of risk
- underground part of a plant
- breaking down of consumed food by an animal
- University of Kentucky
- list of items owned
17 Clues: refers to milk • Blue grass state • plants grow here • the absence of risk • capitol of Kentucky • list of items owned • county seat of Bourbon • University of Kentucky • another term for horse • another term for customer • underground part of a plant • genetically modified organism • makes us sneeze in the spring • the food we eat gives us this • plants that do not lose their leaves • ...
Chemword 2022-06-03
Across
- absorbing heat
- holds the proton and neutrons
- negative charge
- has hydroxide ions
- first name of man who invented periodic table
- bonding between one metal and one non-metal
- positive charge
- neutral charge
Down
- has hydrogen ions
- bonding between two metals
- reaction between acid and base
- smallest particle
- releasing heat
- two of the same element w/ different number of neutrons
14 Clues: absorbing heat • releasing heat • neutral charge • negative charge • positive charge • has hydrogen ions • smallest particle • has hydroxide ions • bonding between two metals • holds the proton and neutrons • reaction between acid and base • bonding between one metal and one non-metal • first name of man who invented periodic table • ...
Famous Scientists Last Names 2024-04-11
Across
- Made a cage for electricity
- _______ radiation is emitted from black holes
- Invented the telephone
- Electric car brand
- Made the theory of evolution
- Made the theory of relativity
- Has a prize named after him
Down
- Calculated the speed of light
- Discovered the radioactive elements
- ______ space telescope
- Invented the telescope
- Developed computing theory
- An apple fell on his head
- Made the periodic table
14 Clues: Electric car brand • ______ space telescope • Invented the telescope • Invented the telephone • Made the periodic table • An apple fell on his head • Developed computing theory • Made a cage for electricity • Has a prize named after him • Made the theory of evolution • Calculated the speed of light • Made the theory of relativity • Discovered the radioactive elements • ...
Try it 2024-12-25
Across
- big or small Steph likes them all
- wish you
- the bane of every climber
- Climb similar to “Pb” on the periodic table
- winter pass time
- wise
- to help one “scale up” in climbing
- travel destination
Down
- Best type of climb
- popular boulder spot
- cause of panic
- flipside of false south
- outdoor climb in ontario
- climb spot like an animal
14 Clues: wise • wish you • cause of panic • winter pass time • Best type of climb • travel destination • popular boulder spot • flipside of false south • outdoor climb in ontario • the bane of every climber • climb spot like an animal • big or small Steph likes them all • to help one “scale up” in climbing • Climb similar to “Pb” on the periodic table
Menu project Ethan King 2023-03-30
Across
- reaction to sunlight
- reaction to touch
- system in body that digests food
- graph that shows all elements
- element used to fill bloons
- letter found on periodic table
Down
- a change that is physical
- element used in pools
- reaction to water
- a change that is chemical
- multi pull elements
- element you inhale
12 Clues: reaction to touch • reaction to water • element you inhale • multi pull elements • reaction to sunlight • element used in pools • a change that is physical • a change that is chemical • element used to fill bloons • graph that shows all elements • letter found on periodic table • system in body that digests food
joshua galindo 2023-03-30
Across
- found on periodic table
- how it reactss to the stimulus
- moves toward gravity
- growing towards a stimulus
- smallest part of an substanse
- reaction in the body
- pressure of water in cell
Down
- out side thing that changes
- moves toward light
- stimulus that internal
- made of elements
- maintaining the body state
12 Clues: made of elements • moves toward light • moves toward gravity • reaction in the body • found on periodic table • stimulus that internal • pressure of water in cell • growing towards a stimulus • maintaining the body state • out side thing that changes • smallest part of an substanse • how it reactss to the stimulus
Changes Around Us 2022-06-05
Across
- construction of buildings
- blooming of flowers
- sneezing
- burning of fuel
- changes that occur at a regular interval of time
- a temporary change
- cooking of food
Down
- bursting of balloon
- a change in which heat is absorbed
- ripening of fruits
- curdling of milk
- a change in which a new substance is formed
12 Clues: sneezing • burning of fuel • cooking of food • curdling of milk • ripening of fruits • a temporary change • bursting of balloon • blooming of flowers • construction of buildings • a change in which heat is absorbed • a change in which a new substance is formed • changes that occur at a regular interval of time
Montessori School 2019-06-26
Across
- 1/2
- The red place value.
- Material used to start a story.
- Animals with fur.
- What the subject does.
- Used for large multiplication.
Down
- First Montessori maths material.
- Every sentence starts with a ________
- The third element of the periodic table
- the dark blue grammar symbol
- The fifth planet
- The hotteset biome.
12 Clues: 1/2 • The fifth planet • Animals with fur. • The hotteset biome. • The red place value. • What the subject does. • the dark blue grammar symbol • Used for large multiplication. • Material used to start a story. • First Montessori maths material. • Every sentence starts with a ________ • The third element of the periodic table
ic vs ick 2024-03-04
Across
- occurring regularly, a __________ visit
- something used to clean teeth
- very large
- a thin piece of wood
- something that happens fast
Down
- without life
- relating to investigating a crime
- a noise a pen can make
- related to a whole system
- musical in nature
- something that bursts out suddenly
- something slippery
12 Clues: very large • without life • musical in nature • something slippery • a thin piece of wood • a noise a pen can make • related to a whole system • something that happens fast • something used to clean teeth • relating to investigating a crime • something that bursts out suddenly • occurring regularly, a __________ visit
East Asia 2024-02-26
Across
- Being likely
- Differing from one another,unlike
- to enter or approach
- Very noticeable.
- Natural disaster involving a tidal wave
- Concerned with
Down
- Having extent
- Having rough or uneven surface
- A periodic rainfall in Southern Asia and in the Indian Ocean
- great in size, big.
- Causing expansion
- Involving cities and technological advances
12 Clues: Being likely • Having extent • Concerned with • Very noticeable. • Causing expansion • great in size, big. • to enter or approach • Having rough or uneven surface • Differing from one another,unlike • Natural disaster involving a tidal wave • Involving cities and technological advances • A periodic rainfall in Southern Asia and in the Indian Ocean
Science Crossword 2023-12-01
Across
- What do reactants make
- What does endothermic reactions do with heat
- Needed to Break Bonds
- makes surroundings hotter
- Acid and base that creates water and salt
- With what are products made
- Makes surroundings colder
- Releases Heat
Down
- Combine Molecules
- h20
- Chemical symbol is O
- What does exothermic reactions do with heat
- Chemical symbol is Cu
- Takes in heat
- Dioxide CO2
- What is on the periodic table
16 Clues: h20 • Dioxide CO2 • Takes in heat • Releases Heat • Combine Molecules • Chemical symbol is O • Needed to Break Bonds • Chemical symbol is Cu • What do reactants make • makes surroundings hotter • Makes surroundings colder • With what are products made • What is on the periodic table • Acid and base that creates water and salt • What does exothermic reactions do with heat • ...
Pre-IB Chemistry 2021-09-13
Across
- negatively charged particle
- Hydrogen ion with double the weight
- The attraction of electrons
- required energy to move a neutron
- horizontal rows
Down
- technique used to measure mass to ion charge
- positively charged particle
- Table Arrangement of elements
- particle with no charge
- positive ions
- atoms that have unique properties
- negative ions
- number The combination of protons and neutrons
- The center of an atom
14 Clues: positive ions • negative ions • horizontal rows • The center of an atom • particle with no charge • positively charged particle • negatively charged particle • The attraction of electrons • Table Arrangement of elements • atoms that have unique properties • required energy to move a neutron • Hydrogen ion with double the weight • technique used to measure mass to ion charge • ...
第一届单词大赛 2022-07-22
Across
- 衰退，腐败
- 减少，扣除，推论
- 溺爱的，喜欢的
- 文明的
- 结果，后果
- 同意，答应
- 解释，说明
- 充足的，足够的
Down
- 周期的
- 维护，维修
- 考古学的
- 情况，环境
- 间谍
- 建筑的，建筑学的
14 Clues: 间谍 • 周期的 • 文明的 • 考古学的 • 维护，维修 • 衰退，腐败 • 情况，环境 • 结果，后果 • 同意，答应 • 解释，说明 • 溺爱的，喜欢的 • 充足的，足够的 • 减少，扣除，推论 • 建筑的，建筑学的
HOVERING VOCABULARY 2017-03-27
Across
- Synonym for 'speed'.
- Regular or repeated action.
- Skill in flying an aircraft.
- A light or soft pressure.
- Synonym for 'continue'.
- Synonym for 'direction'.
- Does not change.
Down
- Authorization or permission.
- Synonym for 'start'.
- A thing that prevents passage or progress.
- To expect or predict something.
- Scattered pieces of waste or remains.
12 Clues: Does not change. • Synonym for 'speed'. • Synonym for 'start'. • Synonym for 'continue'. • Synonym for 'direction'. • A light or soft pressure. • Regular or repeated action. • Authorization or permission. • Skill in flying an aircraft. • To expect or predict something. • Scattered pieces of waste or remains. • A thing that prevents passage or progress.
Atoms by Pounamu Anaru 2014-05-28
Across
- Positive
- neutral, ........ Neutral
- The centre of the atom
- No charge
- It starts with I
Down
- table, Table that has information about atoms.
- everything is made of .....
- Negative
- number, The number of an atom
- shells, It holds electrons
10 Clues: Positive • Negative • No charge • It starts with I • The centre of the atom • neutral, ........ Neutral • shells, It holds electrons • everything is made of ..... • number, The number of an atom • table, Table that has information about atoms.
Tiger’s crossword puzzle 2023-01-20
Across
- related to a base idea
- Repeating pattern
- that proves is a person
- likely something will happen
- to gather or collect
- to tell
- Course of studying in a school
Down
- farming
- as a mutual relationship or connection
- contagious
10 Clues: farming • to tell • contagious • Repeating pattern • to gather or collect • related to a base idea • that proves is a person • likely something will happen • Course of studying in a school • as a mutual relationship or connection
ELEMENT 2019-08-09
Across
- gas in balloon
- diagonal of block-p in Periodic table
- liquid in VIIA
- knife can cut
- Atomic number is 11
Down
- protect simple goiter
- valence electron as 2
- poisonous element
- full valence electron as 8
- Electrical conductivity
10 Clues: knife can cut • gas in balloon • liquid in VIIA • poisonous element • Atomic number is 11 • protect simple goiter • valence electron as 2 • Electrical conductivity • full valence electron as 8 • diagonal of block-p in Periodic table
ELEMENT 2019-08-09
Across
- protect simple goiter
- gas in balloon
- full valence electron as 8
- diagonal of block-p in Periodic table
Down
- liquid in VIIA
- valence electron as 2
- Atomic number is 11
- poisonous element
- Electrical conductivity
- knife can cut
10 Clues: knife can cut • liquid in VIIA • gas in balloon • poisonous element • Atomic number is 11 • valence electron as 2 • protect simple goiter • Electrical conductivity • full valence electron as 8 • diagonal of block-p in Periodic table
Chemistry 2024-08-09
Across
- negative charge
- two or more atoms
- protons and neutrons are in it
- every element is inside it
- positive charge
Down
- most basic unit(technically)
- one atom
- neutral/no charge
- two different atoms
- everything is made of it
10 Clues: one atom • negative charge • positive charge • two or more atoms • neutral/no charge • two different atoms • everything is made of it • every element is inside it • most basic unit(technically) • protons and neutrons are in it
Logistics Book 2 Units 12,13 2024-02-11
Across
- a slopped channel through which materials travel
- easy to manage
- a mechanical belt to transport materials
- occasional
- dispense
- massed together ín large group
Down
- being focused around the center
- non - stop
- for short - term storage
- one seperate unit
10 Clues: dispense • non - stop • occasional • easy to manage • one seperate unit • for short - term storage • massed together ín large group • being focused around the center • a mechanical belt to transport materials • a slopped channel through which materials travel
Atomic Structure and Periodic Table 2023-02-12
Across
- Periods go a.....
- Charge of an electron
- Mg
- Charge of an proton
- Cl
- atomic number of Sulphur
Down
- Groups go d...
- the atomic mass is equal to protons plus
- Fe
- the nucleus of an atom contains neutrons and ........
- atomic mass of Sodium
- Russian Chemist who created the periodic table
12 Clues: Fe • Mg • Cl • Groups go d... • Periods go a..... • Charge of an proton • Charge of an electron • atomic mass of Sodium • atomic number of Sulphur • the atomic mass is equal to protons plus • Russian Chemist who created the periodic table • the nucleus of an atom contains neutrons and ........
units 2025-02-07
Across
- motion of ants
- motion of pendulum
- SI unit of weight
- SI unit of time
- unlike poles
Down
- motion of earth around sun
- temporary magnet
- like poles
- SI unit of length
9 Clues: like poles • unlike poles • motion of ants • SI unit of time • temporary magnet • SI unit of weight • SI unit of length • motion of pendulum • motion of earth around sun
Lets Bond over crossword! 2025-04-28
Across
- (Chance of losing investment)
- (Government bond)
- (Entity that sells a bond)
- (Face value of a bond)
- (Return on a bond)
- (Periodic interest payment)
Down
- (When bond price > face value)
- (End date of the bond)
- (Difference between two yields)
- (Measure of price sensitivity)
- (Failure to pay)
11 Clues: (Failure to pay) • (Government bond) • (Return on a bond) • (End date of the bond) • (Face value of a bond) • (Entity that sells a bond) • (Periodic interest payment) • (Chance of losing investment) • (When bond price > face value) • (Measure of price sensitivity) • (Difference between two yields)
crossword of structure of an atom 2023-10-05
Across
- has negative charge
- vertical column in the periodic table
Down
- has positive charge
- has no charge
- horizontal rows in the periodic table
5 Clues: has no charge • has positive charge • has negative charge • horizontal rows in the periodic table • vertical column in the periodic table