This is a fairly full listing of polyatomic ions.
| Name | Formula |
|---|---|
| ammonium | NH4+ |
| nitrite | NO2– |
| nitrate | NO3– |
| sulfite | SO32– |
| sulfate | SO42– |
| hydrogen sulfate (aka: bisulfate) |
HSO4– |
| thiosulfate | S2O32– |
| oxalate | C2O42– |
| hydroxide | OH– |
| peroxide | O22– |
| cyanide | CN– |
| phosphite | PO33– |
| phosphate | PO43– |
| hydrogen phosphate | HPO42– |
| dihydrogen phosphate | H2PO4– |
| Name | Formula |
|---|---|
| perchlorate | ClO4– |
| chlorate | ClO3– |
| chlorite | ClO2– |
| hypochlorite | ClO– |
| bromate | BrO3– |
| iodate | IO3– |
| acetate acetate |
CH3COO– C2H3O2– |
| carbonate | CO32– |
| hydrogen carbonate (aka: bicarbonate) |
HCO3– |
| chromate | CrO42– |
| dichromate | Cr2O72– |
| permanganate | MnO4– |
| cyanate | OCN– |
| thiocyanate | SCN– |