POLYATOMIC IONS CHART

Polyatomic Ion Chemical Symbol Oxidation Number

ammonium NH4+ 1+ acetate C2H3O2- 1-

bicarbonate HCO3- 1- bisulfate HSO4- 1-

bisulfite HSO3- 1- bromate BrO3- 1- Bromite BrO2- 1-

carbonate CO32- 2- chlorate ClO3- 1- chlorite ClO2- 1-

chromate CrO42- 2- cyanide CN- 1-

dichromate Cr2O72- 2- ferrocyanide Fe(CN)64- 4- ferricyanide Fe(CN)63- 3- hydroxide OH- 1-

hypobromite BrO- 1-

Polyatomic Ion Chemical Symbol Oxidation Number

hypochlorite ClO- 1- hypoiodate IO- 1-

iodate IO3- 1- Iodite IO2- 1- nitrate NO3- 1- nitrite NO2- 1- oxalate C2O42- 2-

perbromate HBrO3- 1- perchlorate ClO4- 1-

permanganate MnO4- 1- peroxide O22- 2-

phosphate PO43- 3- sulfate SO42- 2- sulfite SO32- 2-

thiosulfite S2O32- 2- hydrogen phosphate HPO42- 2-

dihydrogen phosphate H2PO4- 1-