Common Polyatomic Ions
Name(s)
Formula
NH4+
Name(s)
ammonium
iodate
IO3-
acetate
CH3COOC2H3O2-
nitrate
NO3-
nitrite
bromate
BrO3-
NO2-
oxalate
carbonate
CO32-
C2O42-
perchlorate
chlorate
ClO3-
ClO4-
periodate
chlorite
ClO2-
IO4-
permanganate
MnO4-
peroxide
O22-
phosphate
PO43-
phosphite
PO33-
silicate
SiO44-
CrO42-
chromate
CN-
cyanide
Cr2O72-
dichromate
hydrogen carbonate
bicarbonate
HCO3-
hydrogen sulfate
bisulfate
HSO4-
sulfate
Formula
SO42-
sulfite
SO32-
hydrogen phosphate
biphosphate
HPO42-
thiocyanate
SCN-
hydroxide
OH-
thiosulfate
S2O32-
hypochlorite
ClO-
Other Ions
copper (I)
copper (II)
iron (II)
iron (III)
lead (II)
lead (IV)
mercury (I)
mercury (II)
tin (II)
tin (IV)
cuprous
cupric
ferrous
ferric
plumbous
plumbic
mercurous
mercuric
stannous
stannic
Cu+
Cu2+
Fe2+
Fe3+
Pb2+
Pb4+
Hg22+
Hg2+
Sn2+
Sn4+