AP Chem Polyatomic Anions & Cations

Acetate

C₂H₃O₂^-

Bicarbonate

HCO₃^-

Bromate

BrO₃^-

Perchlorate

ClO₄^-

Chlorate

ClO₃^-

Chlorite

ClO₂^-

Hypochlorite

ClO^-

Cyanide

CN^-

Dihydrogen phosphate

H₂PO₄^-

Hydrogen sulfate

HSO₄^-

Hydroxide

OH^-

Iodate

IO₃^-

Periodate

IO₄^-

Nitrate

NO₃^-

Nitrite

NO₂^-

Permangante

MnO₄^-

Carbonate

CO₃^2-

Chromate

CrO₄^2-

Dichromate

Cr₂O₇^2-

Hydrogen phosphate

HPO₄^2-

Oxalate

C₂O₄^2-

Peroxide

O₂^2-

Silicate

SiO₃^2-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Thiosulfate

S₂O₃^2-

Phosphate

PO₄^3-

Ammonium

NH₄⁺

Mercury (I)

Hg₂²⁺