AP Chem Polyatomic Ions

Name

Formula

Name

Formula

Acetate

C₂H₃O₂^-

Bicarbonate (Hydrogen carbonate)

HCO₃^-

Bromate

BrO₃^-

Perchlorate

ClO₄^-

Chlorate

ClO₃^-

Chlorite

ClO₂^-

Hypochlorite

ClO^-

Hydroxide

OH^-

Iodate

IO₃^-

Nitrate

NO₃^-

Nitrite

NO₂^-

Permanganate

MnO₄^-

Cyanide

CN^-

Thiocyanate

SCN^-

Name

Formula

Name

Formula

Carbonate 

CO₃^2-

Chromate

CrO₄^2-

Dichromate

Cr₂O₇^2-

Oxalate

C₂O₄^2-

Silicate

SiO₃^2-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Tartrate

C₄H₄O₆^2-

Thiosulfate

S₂O₃^2-

Hydrogen Phosphate

HPO₄^2-

Name

Formula

Name

Formula

Phosphate 

PO₄^3-

Phosphite

PO₃^3-

Arsenate

AsO₄^3-

Name

Formula

Name

Formula

Cadmium Ion

Cd²⁺

Silver Ion

Ag⁺

Zinc Ion

Zn²⁺

Ammonium

NH₄⁺

Mercury (I)

Hg₂²⁺

Mercury (II)

Hg²⁺

Peroxide

O₂^2-

Superoxide

O₂^-

Hydronium

H₃O⁺