Common Polyatomic Ions

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Mercury

Hg2 (2+)

Ammonium

NH4 (+)

Nitrite

NO2 (-)

Nitrate

NO3 (-)

Sulfite

SO3 (2-)

Sulfate

SO4 (2-)

Hydrogen Sulfate

HSO4 (-)

Hydroxide

OH (-)

Cyanide

CN (-)

Phosphate

PO4 (3-)

Hydrogen phosphate

HPO4 (2-)

Dihydrogen phosphate

H2PO4 (-)

Thiocyanate

NCS (-)

Carbonate

CO3 (2-)

Hydrogen Carbonate

HCO3 (-)

Hypochlorite

ClO (-)

Chlorite

ClO2 (-)

Chlorate

ClO3 (-)

Perchlorate

ClO4 (-)

Acetate

C2H302 (-)

Permanganate

MnO4 (-)

Dichromate

Cr2O7 (2-)

Chromate

CrO4 (2-)

Peroxide

O2 (2-)

Oxalate

C2O4 (2-)

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