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polyatomic
| Question | Answer |
|---|---|
| Arsenate | AsO4-3 |
| borate | BO3-3 |
| Carbonate | CO3-2 |
| Cyanide | CN- |
| oxalate | C2O4-2 |
| acetate | C2H3O2- |
| perchlorate | ClO4- |
| chlorate | ClO3- |
| chlorite | ClO2- |
| hypochlorite | ClO- |
| chromate | CrO4-2 |
| dichromate | Cr2O7-2 |
| hydrogen carbonate (bicarbonate) | HCO3- |
| hydrogen sulfate (bisulfate) | HSO4- |
| hydrogen sulfite (bisulfite) | HSO3- |
| hydrogen oxalate (binoxalate) | HC2O4- |
| hydrogen phosphate | HPO4-2 |
| dihydrogen phosphate | H2PO4- |
| hydrogen sulfide | HS- |
| permanganate | MnO4- |
| amide | NH2- |
| ammonium | NH4+ |
| nitrate | NO3- |
| nitrite | NO2- |
| hydroxide | OH- |
| peroxide | O2-2 |
| phosphate | PO4-3 |
| phosphite | PO3-3 |
| thiosulfate | S2O3-2 |
| sulfate | SO4-2 |
| sulfite | SO3-2 |
| silicate | SiO3-2 |