| Hydrogen | H+ | Hydroxide | OH ¯ |
| Ammonium | NH4+ | Chloride | Cl ¯ |
| Silver | Ag + | Bromide | Br ¯ |
| Lithium | Li + | Iodide | I ¯ |
| Sodium | Na + | Nitrate | NO3¯ |
| Potassium | K + | Hydrogencarbonate | HCO3¯ |
| Magnesium | Mg 2+ | Oxide | O 2 ¯ |
| Calcium | Ca 2+ | Sulphide | S 2 ¯ |
| Barium | Ba 2+ | Carbonate | CO32 ¯ |
| Iron(II) | Fe 2+ | Sulphate | SO42 ¯ |
| Copper | Cu 2+ | Nitride | N3 ¯ |
| Lead | Pb 2+ | Phosphate | PO43 ¯ |
| Iron(III) | Fe 3+ | ||
| Aluminium | Al 3+ |