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Polyatomic Ions
| Polyatomic Ion | Formula |
|---|---|
| Nitrate | NO3- |
| Nitrite | NO2- |
| Carbonate | CO3-2 |
| Carbonite | CO2- |
| Sulfate | SO4-2 |
| Sulfite | SO3-2 |
| Phosphate | PO4-3 |
| Phosphite | PO3-3 |
| Perchlorate | ClO4- |
| Chlorate | ClO3- |
| Chlorite | ClO2- |
| Hypochlorite | ClO- |
| Perbromate | BrO4- |
| Bromate | BrO3- |
| Bromite | BrO2- |
| Hypobromite | BrO- |
| Periodate | IO4- |
| Iodate | IO3- |
| Iodite | IO2- |
| Hypoiodite | IO- |
| Dichromate | Cr2O7-2 |
| Chromate | CrO4-2 |
| Permanganate | MnO4- |
| Hydroxide | OH- |
| Ammonium | NH4+ |
| Hydronium | H3O+ |