Polyatomic Ions

phosphite

PO_3^3-

chromate

CrO_4^2-

perchlorate

ClO_4^-

sulfate

SO_4^2-

hypoclorite

ClO_-

chlorite

ClO_2^-

thiosulfate

SO_3^2-

acetate

C2H3O2^-

hydrogen sulfate (bisulfate)

HSO_4^-

oxalate

C2O4^2-

phosphate

PO_4^3-

bromate

BrO_3^-

nitrite

NO_2^-

chlorate

ClO_3^-

dihydrogen phosphate

H₂PO_4^-

sulfite

SO_{3^{- 2}}

hydrogen carbonate (bicarbonate)

HCO_3^-