polyatomic ions

Hg22+ 
Mercury(I)
NH4+

Ammonium

NO2
Nitrite
NO3
Nitrate
SO32-
          Sulfite
SO42-
Sulfate
HSO4
Hydrogen Sulfate
OH
Hydroxide
CN
Cyanide
PO43-
Phosphate
HPO42-

Hydrogen Phosphate

H2PO4
Dihydrogen Phosphate
NCS
Thiocyanate
CO32-
          Carbonate
HCO3

Hydrogen Carbonate

ClO
Hypochlorite
ClO2
Chlorite
ClO3
Chlorate
ClO4
Perchlorate
C2H3O2
Acetate
MnO4
Permanganate
Cr2O72-
Dichromate
CrO42-
Chromate
O22-
Peroxide
C2O42-
Oxalate
S2O32-
Thiosulfate
x

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