Polyatomic Ions

$CO_3^{2-}$

Carbonate

$HCO_3^-$

Hydrogen carbonate

$CH_3COO^-$

Acetate

$CN^-$

Cyanide

$SCN^-$

Thiocyanate

$ClO^-$

Hypochlorite

$ClO_2^-$

Chlorite

$ClO_3^-$

Chlorate

$ClO_4^-$

Perchlorate

$CrO_4^{2-}$

Chromate

$Cr_2O_7^{2-}$

Dichromate

$MnO_4^-$

Permanganate

$N_3^-$

Azide

$NH_4^+$

Ammonium

$NO_2^-$

Nitrite

$NO_3^-$

Nitrate

$OH^-$

Hydroxide

$O_2^{2-}$

Peroxide

$PO_4^{3-}$

Phosphate

$HPO_4^{2-}$

Hydrogen phosphate

$H_2PO_4^-$

Dihydrogen phosphate

$S_2^{2-}$

Disulfide

$SO_3^{2-}$

Sulfite

$SO_4^{2-}$

Sulfate

$HSO_3^-$

Hydrogen sulfite

$HSO_4^-$

Hydrogen sulfate