AP Chemistry: Polyatomic Ions

Ammonium

NH₄⁺

acetate

C₂H₃O₂^-

cyanide

CN^-

hydroxide

OH^-

nitrate

NO₃^-

nitrite

NO₂^-

carbonate

CO₃^2-

chromate

CrO₄^2-

dichromate

Cr₂O₇^2-

oxalate

C₂O₄^2-

sulfate

SO₄^2-

sulfite

SO₃^2-

thiosulfate

S₂O₃^2-

phosphate

PO₄^3-

borate

BO₃^3-

arsenate

AsO₄^3-

Arsenite

AsO₄^3-

perchlorate

ClO₄^-

chlorate

ClO₃^-

chlorite

ClO^-

bicarbonate / hydrogen carbonate

HCO₃^-

bisulfate / hydrogen sulfate

HSO₄^-

bisulfite / hydrogen sulfite

HSO₃^-

biphosphate / hydrogen phosphate / monohydrogen phosphate

HPO₄^2-

dihydrogen phosphate

H₂PO₄^-