Common Polyatomic Ions

NH4+

Hg 22+

CN-

OH-

O22-

C2H3O2-

C2O42-

ammonium

mercury(I)

cyanide

hydroxide

peroxide

acetate

oxalate

NO3-

SO42-

CO32-

PO43-

ClO3-

MnO4-

Cr2O72-

nitrate

sulfate

carbonate

phosphate

chlorate

permanganate

dichromate

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