Across
- 3. Refers to a vertical column on the periodic table (numbered 1 through 18)
- 8. Gas Any of a group of rare gases that include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and usually radon (Rn); exhibit great stability and extremely low reaction rates
- 10. Electron a number of electrons (between one and eight) in the outer shell of an atom that are responsible for the chemical properties of the atom
- 13. A chemical property that describes the ability of an atom in a molecule to attract shared-pair electrons towards itself
- 17. Earth Metal any of the divalent strongly basic metals of Group 2 of the periodic table comprising beryllium (Be), magnesium (mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)
- 19. Repulsion Fundamental principle stating that like charges repel each other
- 20. Property a characteristic of a particular substance that can be observed during or after a chemical reaction; a quality that can be established only by changing a substance's chemical identity
- 22. Property Physical property, such as mass, length, and volume,that is dependent upon the amount of substance present
- 23. Trend Specific pattern in the chemical and physical properties of elements that you can see as you move across or down the periodic table
- 24. Element A diatomic element is an element that cannot exist by itself as a single atom in nature. Instead, these atoms always pair up in twos to form a stable, two-atom molecule (X2) through covalent bonding
- 25. An element that has physical and chemical properties of both metals and nonmetals
- 27. Phenomenon where inner-shell electrons block or "shield" outer-shell (valence) electrons from feeling the full positive pulling power of the nucleus
- 28. Elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity
Down
- 1. Property Physical property that remains the same no matter how much of a substance is present
- 2. Charge Total positive charge in the nucleus of an atom
- 4. Property Observable characteristic of matter that can be used to identify particular materials
- 5. Metal Any of various metallic elements such as chromium (Cr), iron (Fe), and nickel (Ni) that have valence electrons in two shells instead of only one
- 6. The relative capacity of an atom, molecule, or ion to undergo a chemical reaction with another atom, molecule, or compound
- 7. Any of the chemical elements fluorine (F), chlorine (Cl), bromine (BA), iodine (I), and astatine (At)
- 9. An element that is solid at room temperature, a good conductor of heat and electricity, and generally is shiny; most metals are ductile and malleable
- 11. Table An organizational chart of all the known elements on Earth, organized based on the physical and chemical properties of each
- 12. Data that supports a hypothesis or an argument and is observable through the senses or technology
- 14. Metal any of the six chemical elements that make up Group 1 (Ia) of the periodic table comprising lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr)
- 15. Radius the radius of an atom; the shortest distance between the atom's nucleus and the outermost shell of the atom
- 16. Energy The amount of energy required to remove an electron from an isolated atom or molecule
- 18. A horizontal row of elements in the modern periodic table
- 21. A pure substance that is made up of one type of atom
- 26. Radius Size of an atom after it has gained or lost electrons