Common Polyatomic Ions

 

 

 

C2H3O2

 

 

 

Acetate, 1-

 

 

 

CO3

 

 

 

Carbonate, 2-

 

 

 

HCO3

 

 

 

Hydrogen carbonate (or bicarbonate), 1-

 

 

 

OH

 

 

 

Hydroxide, 1-

 

 

 

NO2

 

 

 

Nitrite, 1-

 

 

 

NO3

 

 

 

Nitrate, 1-

 

 

 

CrO4

 

 

 

Chromate, 2-

 

 

 

Cr2O7

 

 

 

Dichromate, 2-

 

 

 

PO4

 

 

 

Phosphate, 3-

 

 

 

HPO4

 

 

 

Hydrogen phosphate, 2-

 

 

 

H2PO4

 

 

 

Dihydrogen phosphate, 1-

 

 

 

NH4

 

 

 

Ammonium, 1+

 

 

 

ClO

 

 

 

Hypochlorite, 1-

 

 

 

ClO2

 

 

 

Chlorite, 1-

 

 

 

ClO3

 

 

 

Chlorate, 1-

 

 

 

ClO4

 

 

 

Perchlorate, 1-

 

 

 

MnO4

 

 

 

Permanganate, 1-

 

 

 

SO3

 

 

 

Sulfite, 2-

 

 

 

HSO3

 

 

 

Hydrogen sulfite (or bisulfite), 1-

 

 

 

SO4

 

 

 

Sulfate, 2-

 

 

 

HSO4

 

 

 

Hydrogen sulfate (or bisulfate), 1-

 

 

 

CN

 

 

 

Cyanide, 1-

 

 

 

O2

 

 

 

Peroxide, 2-

x

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