list of common polyatomic ions with charges and oxidation numbers
List of Common Polyatomic Ions with Charges and Oxidation Numbers
An ion is an atom or molecule that has acquired an electric charge due to loss or gain of electrons. Thus, a polyatomic ion is an ion that is composed of 2 or more atoms. This Buzzle article lists down some common polyatomic ions with their charges and oxidation numbers.
Polyatomic Ion | Chemical Symbol | Charge | Oxidation Number |
Ammonium | NH4+ | +1 | +1 |
Phosphonium | PH4+ | +1 | +1 |
Hydronium | H3O+ | +1 | +1 |
Fluoronium | H2F+ | +1 | +1 |
Tropylium | C7H7+ | +1 | +1 |
Guanidine | C(NH2)3+ | +1 | +1 |
Mercury | Hg22+ | +2 | +2 |
Acetate | C2H3O2- | -1 | -1 |
Bicarbonate | HCO3- | -1 | -1 |
Bisulphate | HSO4- | -1 | -1 |
Bisulfite | HSO3- | -1 | -1 |
Bromate | BrO3- | -1 | -1 |
Bromite | BrO2- | -1 | -1 |
Chlorate | ClO3- | -1 | -1 |
Chlorite | ClO2- | -1 | -1 |
Cyanide | CN- | -1 | -1 |
Hydroxide | OH- | -1 | -1 |
Hypobromite | BrO- | -1 | -1 |
Hypochlorite | ClO- | -1 | -1 |
Hypoiodite | IO- | -1 | -1 |
Iodate | IO3- | -1 | -1 |
Iodite | IO2- | -1 | -1 |
Nitrate | NO2- | -1 | -1 |
Nitrite | NO2- | -1 | -1 |
Perbromate | HBrO3- | -1 | -1 |
Perchlorate | ClO4- | -1 | -1 |
Permanganate | MnO4- | -1 | -1 |
Dihydrogen phosphate | H2PO4- | -1 | -1 |
Carbonate | CO32- | -2 | -2 |
Chromate | CrO42- | -2 | -2 |
Dichromate | Cr2O72- | -2 | -2 |
Oxalate | C2O42- | -2 | -2 |
Peroxide | O22- | -2 | -2 |
Sulfate | SO42- | -2 | -2 |
Sulfite | SO32- | -2 | -2 |
Thiosulfite | S2O32- | -2 | -2 |
Hydrogen phosphate | HPO42- | -2 | -2 |
Ferricyanide | Fe(CN)63- | -3 | -3 |
Phosphate | PO43- | -3 | -3 |
Ferrocyanide | Fe(CN)64- | -4 | -4 |