Names of Common Polyatomic IonsIon NameNH41 ammoniumNO22 nitriteNO32 nitrateSO322 sulfiteSO422 sulfateHSO42 hydrogen sulfate (bisulfate is a widely used common name)OH2 hydroxideCN2 cyanidePO432 phosphateHPO422 hydrogen phosphateH2PO42 dihydrogen phosphateIon NameCO322 carbonateHCO32 hydrogen carbonate (bicarbonate is a widely used common name)ClO2 hypochloriteClO22 chloriteClO32 chlorateClO42 perchlorateC2H3O22 acetateMnO42 permanganateCr2O722 dichromateCrO422 chromateO222 peroxide