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A list, in alphabetical order, of the most common polyatomic ions, polyatomic anions, polyatomic cations, most common polyatomic ions, table of polyatomic ions, polyatomic anion list.
Download Polyatomic Ions Table
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(Alphabetical by Name)
Polyatomic ions A-C
Acetate C2H3O2 1- or CH3COO 1- |
Aluminate AlO3 3- |
Amide NH2 1- |
Ammonium NH4 1+ |
Arsenate AsO4 3- |
Azide N3 1- |
Benzoate C6H5COO 1- |
Borate BO3 3- |
Bromate BrO3 1- |
Bromite BrO2 1- |
Carbide (saltlike) C2 2- |
Carbonate CO3 2- |
Chlorate ClO3 1- |
Chlorite ClO2 1- |
Chromate CrO4 2- |
Citrate C6H5O7 3- |
Cyanate OCN 1- |
Cyanide CN 1- |
Polyatomic ions D-H
Dichromate Cr2O7 2- |
Dihydrogen Phosphate H2PO4 1- |
Diphosphate (Pyrophospate) P2O7 4- |
Ferricyanide Fe(CN)6 3- |
Ferrocyanide Fe(CN)6 4- |
Formate HCOO 1- |
Hydride H 1- |
*Hydrogen* H 1+ |
Hydrogen Carbonate HCO3 1- |
(Bicarbonate) |
Hydrogen Oxalate HC2O4 1- |
(Binoxalate) |
Hydrogen Phosphate HPO4 2- |
(Monohydrogen Phospate) |
Hydrogen Sulfate HSO4 1- |
(Bisulfate) |
Hydrogen Sulfite HSO3 1- |
(Bisulfite) |
Hydrogen Sufide HS 1- |
(Bisulfide or Hydrosulfide) |
*Hydronium* H3O 1+ |
Hydroxide OH 1- |
Hypobromite BrO 1- |
Hypochlorite ClO 1- |
Hypoiodite IO 1- |
Hypophosphite PO2 3- |
Polyatomic ions I-P
Imide NH 2- |
Iodate IO3 1- |
Iodite IO2 1- |
Manganate MnO4 2- |
Metasilicate (chain) (SiO3 2-)x |
Nitrate NO3 1- |
Nitrite NO2 1- |
Oxalate C2O4 2- |
Perbromate BrO4 1- |
Perchlorate ClO4 1- |
Periodate IO4 1- |
Permanganate MnO4 1- |
Peroxide O2 2- |
Peroxydisulfate S2O8 2- |
Phosphate PO4 3- |
Phosphite PO3 3- |
Phthalate C8H4O4 2- |
Polysulfide Sx 2- |
Polyatomic ions S-Z
Selenate SeO4 2- |
Silicate SiO4 4- |
Sulfate SO4 2- |
Sulfite SO3 2- |
Tartrate C4H4O6 2- |
Tellurate TeO4 2- |
Tellurite TeO3 2- |
Tetraborate B4O7 2- |
Thiocyanate SCN 1- |
Thiosulfate S2O3 2- |
Triiodide I3 1- |
Tripolyphospate P3O10 5- |
Tungstate WO4 2- |
Vandate VO3 1- |
Zincate ZnO2 2- |
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