Chemistry 101 Polyatomic Ions

University of Illinois at Urbana-Champaign Introductory to Chemistry

NH4+

Ammonium

NO₂^-

Nitrite

NO₃^-

Nitrate

SO₃^2-

Sulfite

SO₄^2-

Sulfate

HSO₄^-

Hydrogen Sulfate / Bisulfate

OH^-

Hydroxide

CN^-

Cyanide

PO₄^3-

Phosphate

HPO₄^2-

Hydrogen Phosphate

H₂PO₄^-

Dihydrogen Phosphate

CO₃^2-

Carbonate

HCO₃^-

Hydrogen Carbonate / Bicarbonate

ClO^-

Hypchlorite

ClO₂^-

Chlorite

ClO₃^-

Chlorate

ClO₄^-

Perchlorate

C₂H₃O₂^-

Acetate

MnO₄^-

Permanganate

CrO₄^2-

Chromate

Cr₂O₇^2-

Dichromate

O₂^2-

Peroxide