| The atoms in a polyatomic ion are held together by types of chemical bonds known as covalent bonds. |
| The sum of oxidation numbers for all atoms in a polyatomic ion equals the charge on the ion, and the sum of all oxidation numbers for atoms in a neutral molecule equals zero. |
| Molecular orbital treatment of diatomic molecules, hybridization and polyatomic molecules. |
| Some compounds have polyatomic ions, where the ion is composed of two or more atoms. |
| A polyatomic molecule with bonds which are polar is not necessarily polar itself. |
| The fact that a polyatomic ion has a charge means that it must have taken on or given up electrons. |
