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Polyatomic ions
| Name | Formula |
|---|---|
| Ammonium | NH4(+) |
| Hypochlorite | ClO(-) |
| Chlorite | ClO2(-) |
| Chlorate | ClO3(-) |
| Perchlorate | ClO4(-) |
| Iodite | IO2(-) |
| Iodate | IO3(-) |
| Periodate | IO4(-) |
| Nitrite | NO2(-) |
| Nitrate | NO3(-) |
| Hydroxide | OH(-) |
| Acetate | CH3COO(-) |
| Cyanide | CN(-) |
| Cyanate | OCN(-) |
| Bisulfite | HSO3(-) |
| Bisulfate | HSO4(-) |
| Bicarbonate | HCO3(-) |
| Bromate | BrO3(-) |
| Permanganate | MnO4(-) |
| Carbonate | CO3(2-) |
| Sulfite | SO3(2-) |
| Sulfate | SO4(2-) |
| Thiosulfate | S2O3(2-) |
| Chromate | CrO4(2-) |
| Dichromate | Cr2O7(2-) |
| Oxalate | C2O4(2-) |
| Silicate | SiO3(2-) |
| Peroxide | O2(2-) |
| Phosphite | PO3(3-) |
| Phosphate | PO4(3-) |
| Arsenite | AsO3(3-) |
| Arsenate | AsO4(3-) |
| Borate | BO3(3-) |
| Pyrophosphate | P2O7(4-) |