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Polyatomic Ions
| Ion | Formula |
|---|---|
| Sulfide | SO3 2- |
| Peroxide | O2 2- |
| Carbonate | CO3 2- |
| Phosphite | PO3 3- |
| Dichromate | Cr2O7 2- |
| Silicate | SiO3 2- |
| Perchlorate | ClO4 - |
| Nitrite | NO2 - |
| Chlorite | ClO2 - |
| Hydrogen Sulfite | HSO3 - |
| Hypochlorate | ClO - |
| Acetate | C2H3O2 - |
| Cyanide | CN - |
| Phosphate | PO4 3 - |
| Chromate | CrO4 2 - |
| Oxalate | Cr2O4 2 - |
| Permanganate | MnO4 - |
| Hydrogen Sulfate | HSO4 - |
| Ammonium | NH4 + |
| Selenate | SEO4 2 - |
| Sulfate | SO4 2 - |
| Dihydrogen Phosphate | H2PO4 - |
| Nitrite | N03 - |
| Iodate | IO 3- |
| Hydronium | H3O + |
| Chlorate | ClO3- |
| Thiocyanite | SCN - |
| Bromate | BrO3 - |
| Hydroxide | OH - |
| Hydrogen Carbonate | HCO3 - |