Common Polyatomic Ions

ordered according to charge and ion family


+1 CHARGE
-1 CHARGE
-2 CHARGE
-3 CHARGE
-4 CHARGE
ion
name
ion
name
ion
name
ion
name
ion
name
NH4+
ammonium
H2PO3-
dihydrogen phosphite
HPO32-
hydrogen phosphite
PO33-
phosphite
P2O74-
pyrophosphate
H3O+
hydronium
H2PO4-
dihydrogen phosphate
HPO42-
hydrogen phosphate
PO43-
phosphate


Hg22+
mercury(I)
HCO3-
hydrogen carbonate
CO32-
carbonate
PO23-
hypophosphite




HSO3-
hydrogen sulfite
SO32-
sulfite
AsO33-
arsenite




HSO4-
hydrogen sulfate
SO42-
sulfate
AsO43-
arsenate




NO2-
nitrite
S2O32-
thiosulfate






NO3-
nitrate
SiO32-
silicate






OH-
hydroxide
C22-
carbide






CH3COO-
acetate
C2O42-
oxalate






CrO2-
chromite
CrO42-
chromate






CN-
cyanide
Cr2O72-
dichromate






CNO-
cyanate
C4H4O62-
tartrate






CNS-
thiocyanate
MoO42-
molybdate






O2-
superoxide
O22-
peroxide






MnO4-
permanganate
S22-
disulfide






ClO-
hypochlorite








ClO2-
chlorite








ClO3-
chlorate








ClO4-
perchlorate








BrO-
hypobromite








BrO2-
bromite








BrO3-
bromate








BrO4-
perbromate








IO-
hypoiodite








IO2-
iodite








IO3-
iodate








IO4-
periodate








AlO2-
aluminate








N3-
azide