Across
- 1. A negativity charged ion, formed by a gain of electrons
- 3. The radius of an atom. Cations are smaller, anions are larger than their atom
- 5. the ability of an object to transfer heat or electricity to another object
- 7. Alkali metals.
- 11. A set of elements typically placed at the bottom of the periodic table that consist of the f block elements form Period 7
- 13. An element of Group 17 on the periodic tale. It is a highly reactive nonmetal with seven valence electrons. It easily gains an additional electron to make a 1- anion
- 14. brittle , dull, poor conductors of heat and electricity
- 16. Positively charged particle in the nucleus of an atom
- 20. Process of atoms joining to form molecules or formula units. Electrons are transferred or shared in this process.
- 22. An element from the f block of the periodic table (lanthanoid and actinoid series)
- 26. The measure of the attraction between the nucleus of an atom and shared electrons in chemical bonds
- 31. smallest part of a substance that cannot be divided by chemical means.
- 33. The radius of an atom
- 36. physical property of metals; able to be hammered into thin sheets
- 37. Unreactive, like noble gases
- 39. hard, grey-white, good conductors of electricity, calcium and magnesium are examples, Group 2 elements
- 41. Group 17 A group of reactive nonmetals. Group 17
- 45. One of a general group of elements with similar characteristics, such as being solid at room temperature, lustrous, malleable, ductile, and a good conductor of heat and electricity.
- 46. Electrons on the outermost energy level of an atom
- 48. can be made into a wire
- 49. The change in energy when an electron is added to a neutral atom to form an anion
- 51. The amount of energy required to remove an electron from an atom
- 52. An element of Group 18 on the periodic table. It is a nonreactive (inert) nonmetallic gas with a full valence shell
Down
- 2. Group 18 Unreactive nonmetals. Atoms of this group have a full set of electrons in their outer level.
- 4. A compound that contains oxygen, often oxygen combined with one other element
- 6. An element from the d block of the periodic table (Groups 3-12). It is a metal that typically has one or two valence electrons that it easily loses to form a 1+ or 2+ cation
- 8. A table of all the known elements ordered by increasing atomic number and arranged in a manner that models the atomic structure of the elements
- 9. most are hard and shiny, less reactive, examples are iron, copper, nickel and gold
- 10. A column of the periodic table that includes elements that have similar properties because they have similar electron configurations. Aka. a family
- 12. A neutral subatomic particle that is neutral and that is found in the nucleus of an atom
- 15. metallic luster reflecting light;metallic luster, shiny
- 17. A row in the periodic table that includes elements that have their valence electrons in the same energy level. The period number represents the valence shell. Aka. a series
- 18. A positively charged ion, formed by a lost of electrons
- 19. A set of elements typically placed at the bottom of the periodic table that consists of the f block elements from period 6
- 21. Number The number of protons in the nucleus of an atom of an element
- 23. A tiny, negatively charged particle that moves around the nucleus of an atom.
- 24. transition metals
- 25. Good conductor of heat and electricity. Has luster and high density.
- 27. groups (families) vertical columns on the periodic table
- 28. horizontal rows on the periodic table
- 29. Alkaline earth metals
- 30. very reactive, not found alone in nature, potassium and sodium are examples, Group 1 elements
- 32. One of a general group of elements with similar characteristics, such as being a gas or a soft, crumbly solid at room temperature, and being a poor conductor of heat and electricity.
- 34. pure substance that consists entirely of one type of atom
- 35. An element with an atomic number greater than 92, the atomic number of uranium
- 38. One of a general group of elements with characteristics that are between those of metals and nonmetals. Aka. a semiconductor
- 40. An element of Group 2 on the periodic table. It is a reactive metal, having two valence electrons that is easily loses to form a 2+ cation
- 42. An element of Group 1 on the periodic table. It is a soft, highly reactive metal that has one valence electron that it easily loses to form a 1+ cation
- 43. the ease and speed with which an element combines or reacts with other elements and compounds
- 44. A compound that contains sulfur, often sulfur combined with one other element
- 47. Found along the 'staircase'. Have properties of both metals and nonmetals
- 50. Brittle, poor conductors, no luster; can be a solid (s), liquid (l) or gas.(g)