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Polyatomic Ions
| Formula | Name |
|---|---|
| NH4+ | ammonium |
| OH- | hydroxide |
| CH3COO-/CH3CO2 | acetate |
| CO3 -2 | carbonate |
| HCO3- | bicarbonate |
| NO2- | nitrite |
| NO3- | nitrate |
| SO3 2- | sulfite |
| SO4 2- | sulfate |
| PO3 3- | phosphite |
| PO4 3- | phosphate |
| ClO- | hypochlorite |
| ClO2- | chlorite |
| ClO3- | chlorate |
| ClO4- | perchlorate |
| CrO4 2- | chromate |
| MnO4 2- | permanganate |
| CN- | cyanide |
| HSO3 2- | hydrogen sulfite |
| HSO4 2- | hydrogen sulfate |
| HPO4 -2 | hydrogen phosphate |
| H2PO4- | dihydrogen phosphate |