AP Chem Polyatomic Ions List

Mercury(I)

Mercury(I)

Hg2^2+

Ammonium

NH4^+

Nitrite

NO2^1-

Nitrate

NO3^1-

Sulfite

SO3^2-

Sulfate

SO4^2-

Hydrogen Sulfate (bisulfate)

HSO4^1-

Hydroxide

OH^1-

Cyanide

CN^1-

Phosphate

PO4^3-

Hydrogen Phosphate

HPO4^2-

Dihydrogen Phospate

H2PO4^1-

Thiocyanate

SCN^1-

Carbonate

CO3^2-

Hydrogen Carbonate (Bicarbonate)

HCO3^1-

Hypochlorite

ClO^1-

Chlorite

ClO2^1-

Chlorate

ClO3^1-

Perchlorate

ClO4^1-

Acetate

CH3COO^1- or C2H3O2^1-

Permanganate

MnO4^1-

Dichromate

Cr2O7^2-

Peroxide

O2^2-

Oxalate

C2O4^2-

Thiosulfate

S2O3^2-

Hydrochloric Acid

HCl

Hydrobromic Acid

HBr

Hydroiodic acid

HI

Perchloric acid

HClO4

Chloric Acid

HClO3

Sulfuric Acid

H2SO4

Nitric Acid

HNO3

Chromate

CrO4^2-