| A | B |
|---|
| Valence Electrons | Electrons in the highest occupied energy level |
| Octet Rule | Atoms will react to achieve 8 electrons in the outer energy level |
| Covalent Bonds | Electrons are shared |
| Molecular Formulas | Show the number and kinds of atoms present in a compound |
| Cation | Positive Ion |
| Anion | Negative Ion |
| ionic bonds | electrons are transferred |
| polyatomic | group of ions |
| ion | atom that loses or gains electrons |
| atom | smallest particle of an element |
| atomic number | number of protons in an atom |
| mass number | sum of protons and neutrons |
