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Polyatomic ions
| Name | Formula |
|---|---|
| Ammonium | NH₄⁺ |
| Hydronium | H₃O⁺ |
| Acetate | C₂H₃O₂⁻ |
| Cyanide | CN⁻ |
| Hydroxide | OH⁻ |
| Hypochlorite | ClO⁻ |
| Chlorite | ClO₂⁻ |
| Chlorate | ClO₃⁻ |
| Perchlorate | ClO₄⁻ |
| Nitrite | NO₂⁻ |
| Nitrate | NO₃⁻ |
| Permanganate | MnO₄⁻ |
| Carbonate | CO₃²⁻ |
| Bicarbonate | HCO₃⁻ |
| Chromate | CrO₄²⁻ |
| Dichromate | Cr₂O₇²⁻ |
| Peroxide | O₂²⁻ |
| Phosphate | PO₄³⁻ |
| Hydrogen phosphate | HPO₄³⁻ |
| Dihydrogen phosphate | H₂PO₄³⁻ |
| Sulfite | SO₃²⁻ |
| Sulfate | SO₄²⁻ |
| Bisulfate | HSO₄⁻ |
| Bromate | BrO₃⁻ |
| Iodate | IO₃⁻ |