Common Polyatomic Ions

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hint

NH4+

NH4+

Ammonium

Hg2(2+)

Mercury(I)

H3O+

Hydronium

PH4+

Phosphonium

O2(2-)

Peroxide

OH-

Hydroxide

N3-

Azide

C2H3O2-

Acetate

C2O4(2-)

Oxalate

CrO4(2-)

Chromate

Cr2O7(2-)

Dichromate

MnO4-

Permanganate

CO3(2-)

Carbonate

NO2-

Nitrite

NO3-

Nitrate

PO4(3-)

Phosphate

SO3(2-)

Sulfite

SO4(2-)

Sulfate

ClO-

Hypochlorite

ClO2-

Chlorite

ClO3-

Chlorate

ClO4-

Perchlorate

BrO3-

Bromate

IO3-

Iodate

BO3(3-)

Borate

CN-

Cyanide

OCN-

Cyanate

SCN-

Thiocyanate

HCO3-

Bicarbonate

HPO4(2-)

Monohydrogen phosphate

H2PO4-

Dihydrogen phosphate

HSO3-

Bisulfite

HSO4-

Bisulfate