PERIODIC TABLE

4. A symbol used in formulas to show more than one polyatomic ion.
7. A type of metal that can have more than one oxidation number.
9. The tendency of an atom to have a full outer electron shell.
10. A negatively charged ion formed when an atom gains electrons.
11. A chemical shorthand that shows the types and numbers of atoms in a compound.
13. A positively charged ion formed when an atom loses electrons.
14. The ability of an atom to lose, gain, or share electrons when forming compounds.

1. The rule that positive and negative charges must cancel out in a compound.
2. The arrangement of electrons in shells around an atom.
3. A horizontal row in the periodic table that shows the number of electron shells.
5. A tiny negatively charged particle that moves around the nucleus of an atom.
6. A vertical column in the periodic table where elements have the same number of outer electrons.
8. The loss of electrons by an atom or ion.
9. An energy level around the nucleus where electrons are found.
12. An atom or group of atoms that has a charge because it has lost or gained electrons.
13. The electrical property of an ion caused by losing or gaining electrons.