Different Polyatomic Ions and their Formulas

These are ONLY some common polyatomic ions and not all of them.

NH₄⁺

ammonium

H₃O⁺

hydronium

CH₃COO^- | C₂H₃O₂^-

acetate

CN^-

cyanide

OH^-

hydroxide

ClO^-

hypochlorite

ClO₂^-

chlorite

ClO₃^-

chlorate

ClO₄^-

perchlorate

NO₂^-

nitrite

NO₃^-

nitrate

MnO₄^-

permanganate

CO₃^2-

carbonate

HCO₃^-

bicarbonate

CrO₄^2-

chromate

Cr₂O₇^2-

dichromate

O₂^2-

peroxide

PO₄^3-

phosphate

HPO₄^2-

hydrogen phosphate

H₂PO₄^-

dihydrogen phosphate

SO₃

sulfite

SO₄

sulfate

HSO₄^-

hydrogen sulfate (bisulfate)