RESOURCE: Common Polyatomic Ions

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Cations

$H_{3} O^{+} \to$ Hydronium
$NH_{4}^{+} \to$ Ammonium
$PH_{4}^{+} \to$ Phosphonium

Anions

Group 3

$B O 3^{3 -} \to$ Borate

Group 4

Inorganic

$CN^{-} \to$ Cyanide
$CO_{3}^{-} \to$ Carbonate
$HCO_{3}^{-} \to$ Bicarbonate
$SiO_{3}^{2 -} \to$ Silicate/Metasilicate
$SnO_{3}^{2 -} \to$ Stannate

Organic

$C_{2} O_{4}^{2 -} \to$ Oxalate
$C_{2} H_{3} O_{2}^{-} \to$ Acetate
$C_{3} H_{5} O_{3}^{-} \to$ Lactate/Propionate
$C_{6} H_{8} O_{7}^{3 -} \to$ Citrate
$C_{7} H_{5} O_{2}^{-} \to$ Benzoate
$C_{7} H_{5} O_{3}^{-} \to$ Salicylate

Group 5

$N_{3}^{-} \to$ Azide
$NO_{3}^{-} \to$ Nitrate
$NO_{2}^{-} \to$ Nitrite
$PO_{4}^{3 -} \to$ Phosphate
$HPO_{4}^{2 -} \to$ Hydrogen Phosphate
$H_{2} PO_{4}^{-} \to$ Dihydrogen Phosphate
$AsO_{4}^{3 -} \to$ Arsenate
$AsO_{3}^{3 -} \to$ Arsenite

Group 6

$O_{2}^{2 -} \to$ Peroxide
$OH^{-} \to$ Hydroxide
$SO_{4}^{2 -} \to$ Sulfate/Sulphate
$SO_{3}^{2 -} \to$ Sulfite/Sulphite
$HSO_{4}^{-} \to$ Bisulphate/Bisulfate
$HSO_{3}^{-} \to$ Bisulphite/Bisulfite
$SCN^{-} \to$ Thiocyanate
$S_{2} O_{3}^{2 -} \to$ Thiosulfate/Thiosulphate
$S_{2} O_{8}^{2 -} \to$ Peroxydisulfate/Peroxydisulphate
$SeO_{4}^{2 -} \to$ Selenate

Group 7

$FO_{3}^{-} \to$ Fluorate
$ClO_{4}^{-} \to$ Perchlorate
$ClO_{3}^{-} \to$ Chlorate
$ClO_{2}^{-} \to$ Chlorite
$ClO^{-} \to$ Hypochlorite
$BrO_{3}^{-} \to$ Bromate
$BrO_{2}^{-} \to$ Bromite
$IO_{3}^{-} \to$ Iodate
$IO_{2}^{-} \to$ Iodite
$AtO_{3}^{-} \to$ Astatate

Transitional Metal Anions

$CrO_{4}^{2 -} \to$ Chromate
$Cr_{2} O_{7}^{2 -} \to$ Dichromate
$MnO_{4}^{-} \to$ Permaganate
$MnO_{4}^{2 -} \to$ Maganate
$WO_{4}^{2 -} \to$ Tungstate
$MoO_{4}^{2 -} \to$ Molybdate
$Fe (CN)_{6}^{4 -} \to$ Ferrocyanide
$VO_{3}^{-} \to$ Vanadate

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