Appendix
Common Polyatomic Ions
Polyatomic Ions (common)
| Cations | |
| NH4+ | Ammonium |
| Hg22+ | Mercury(I) |
| Anions (1-) | |
| OH− | Hydroxide |
| HSO4− | Hydrogen sulfate |
| CH3COO− | Acetate |
| ClO− | Hypochlorite |
| ClO2− | Chlorite |
| ClO3− | Chlorate |
| ClO4− | Perchlorate |
| NO2− | Nitrite |
| NO3− | Nitrate |
| MnO4− | Permanganate |
| H2PO4− | Dihydrogen phosphate |
| CN− | Cyanide |
| HCO3− | Hydrogen carbonate |
| SCN− | Thiocyanate |
| Anions (2-) | |
| O22− | Peroxide |
| SO32− | Sulfite |
| SO42− | Sulfate |
| S2O32− | Thiosulfate |
| Cr2O72− | Dichromate |
| CrO42− | Chromate |
| CO32− | Carbonate |
| HPO42− | Monohydrogen phosphate |
| C2O42− | Oxalate |
| Anions (3-) | |
| PO43− | Phosphate |
| AsO43− | Arsenate |
