| A | B |
|---|
| Number of groups on PT | 18 |
| Number of periods | 7 |
| Charge on a proton | Positive |
| Charge on a neutron | Neutral |
| Charge on an electron | Negative |
| Electrons farthest away from the nucleus | Valence electrons |
| The ability of an atom to create compounds with others | Oxidation number |
| Charged particle | Ion |
| Strong bond with high melting point | Ionic bond |
| Weak bond with low melting point | Covalent bond |
| Ability of a substance to give off odor | Volatility |
| Reason why equations must be balanced | Law of conservation of matter |
| Number of molecules of a compound | Coefficient |
| Number of atoms of an element in a compound | Subscript |
| # of protons & electrons in the nucleus | Atomic number |
| # of liquids on periodic table | 2 |
| The only nonmetal on left side of PT | Hydrogen |
| Group that has 8 valence electrons | Noble gases |
