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Polyatomic Ions
| Term | Definition |
|---|---|
| Acetate | C₂H₃O₂⁻ |
| Ammonium | NH₄⁺ |
| Bicarbonate (hydrogen carbonate) | HCO₃⁻ |
| Bisulfate (hydrogen sulfate) | HSO₄⁻ |
| Ammonium | NH₄⁺ |
| Bisulfite (hydrogen sulfite) | HSO₃⁻ |
| Carbonate | CO₃²⁻ |
| Chromate | CrO₄²⁻ |
| Bicarbonate (hydrogen carbonate) | HCO₃⁻ |
| Cyanide | CN⁻ |
| Bisulfate (hydrogen sulfate) | HSO₄⁻ |
| Bisulfite (hydrogen sulfite) | HSO₃⁻ |
| Carbonate | CO₃²⁻ |
| Hydroxide | OH⁻ |
| Chromate | CrO₄²⁻ |
| Cyanide | CN⁻ |
| Dichromate | Cr₂O₇²⁻ |
| Sulfite | SO₃²⁻ |
| Hydronium | H₃O⁺ |
| Nitrate | NO₃⁻ |
| Hydroxide | OH⁻ |
| Nitrite | NO₂⁻ |
| Permanganate | MnO₄⁻ |
| Peroxide | O₂²⁻ |
| Oxalate | C₂O₄²⁻ |
| Phosphate | PO₄³⁻ |
| Sulfate | SO₄²⁻ |
| Phosphite | PO₃³⁻ |
| Sulfite | SO₃²⁻ |
| Nitrate | NO₃⁻ |
| Nitrite | NO₂⁻ |
| Peroxide | O₂²⁻ |
| Phosphate | PO₄³⁻ |
| Phosphite | PO₃³⁻ |