| A | B |
| ion | a charged atom |
| ionic bond | bond due to the transfer of electrons |
| covalent bond | bond due to the sharing of electrons |
| chemical bond | what holds atoms together in compounds |
| chemical formula | shows the elements and ratios in a compound |
| oxidation number | shows the combining ability of an atom |
| polyatomic ion | a group of atoms that act as one ion |
| subscript | number used to show ratio of atoms |
| superscript | how an oxidation number is shown |
| chemically stable | outer energy level is filled w/electrons |
| toxic | harmful to living organisms |
| corrosive | reacts with metals and is often toxic |
| binary compound | a compound made of 2 elements |
| hydrate | a molecule w/water chemically attached |
| anhydrous | without water |
| polar molecule | a molecule that is charged at either end |
| nonpolar molecule | a molecue that is not charged at the ends |
| ionic binary compound | a compound made of a metal and a nonmetal |
| covalent binary compound | a compound made of 2 nonmetals |