POLYATOMIC IONS CHART
Polyatomic Ion
Chemical
Symbol
Oxidation
Number
Polyatomic Ion
Chemical
Symbol
Oxidation
Number
ammonium
NH4+
1+
hypochlorite
ClO-
1-
acetate
C2H3O2-
1-
hypoiodate
IO-
1-
bicarbonate
HCO3-
1-
iodate
IO3-
1-
bisulfate
HSO4-
1-
Iodite
IO2-
1-
bisulfite
HSO3-
1-
nitrate
NO3-
1-
bromate
BrO3-
1-
nitrite
NO2-
1-
Bromite
BrO2-
1-
oxalate
C2O42-
2-
carbonate
CO32-
2-
perbromate
HBrO3-
1-
chlorate
ClO3-
1-
perchlorate
ClO4-
1-
chlorite
ClO2-
1-
permanganate
MnO4-
1-
chromate
CrO42-
2-
peroxide
O22-
2-
cyanide
CN-
1-
phosphate
PO43-
32-
dichromate
Cr2O72-
2-
sulfate
SO42-
ferrocyanide
Fe(CN)64-
4-
sulfite
SO32-
2-
ferricyanide
Fe(CN)63-
3-
thiosulfite
S2O32-
2-
hydroxide
OH-
1-
hydrogen phosphate
HPO42-
2-
hypobromite
BrO-
1-
dihydrogen phosphate
H2PO4-
1-