| A | B |
| ion | a positively or negatively charged atom due to gaining or losing electrons |
| superscript | the notations of the positive or negative oxidation numbers |
| stable | an atom with a full outer shell |
| neutral | an atom who has the same number of electrons and protons |
| molecule | neutral particles formed when electrons are shared by atoms rather than being gained or lost |
| ionic bond | type of bond where positively charged ions are attracted to negatively charged ions |
| metallic bond | a type of ionic bond between metals |
| covalent bond | a bond where atoms share electrons to become stable |
| polar molecule | a molecule with unbalanced charges as a result of electrons being shared unequally |
| nonpolar molecule | a molecule with balanced charges whose electrons are shared equally |
| oxidation number | the number of electrons gained or lost when bonding |
| binary compound | a compound made up of atoms from 2 elements |
| formula | a set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound |