List Of Common Polyatomic Ions
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1List of Common Polyatomic Ions
Cations:
Symbol
Name
Charge
Symbol
Name
Charge
+
+2
NH
Ammonium
+1
Hg
Dimercury (I)
+2
4
2
Anions:
Symbol
Name
Charge
Symbol
Name
Charge
-
-2
C
H
O
Acetate
-1
CO
Carbonate
-2
2
3
2
3
-
-2
HCO
Bicarbonate
-1
CrO
Chromate
-2
3
4
-
-2
BrO
Bromate
-1
Cr
O
Dichromate
-2
3
2
7
-
-2
BrO
Bromite
-1
C
O
Oxalate
-2
2
2
4
-
-2
ClO
Perchlorate
-1
O
Peroxide
-2
4
2
-
-2
ClO
Chlorate
-1
SO
Sulfate
-2
3
4
-
-2
ClO
Chlorite
-1
SO
Sulfite
-2
2
3
-
-2
ClO
Hypochlorite
-1
S
O
Thiosulfate
-2
2
3
-
-2
CN
Cyanide
-1
SiO
Silicate
-2
3
-
-2
SCN
Thiocyanate
-1
MoO
Molybdate
-2
4
-
-2
OH
Hydroxide
-1
WO
Tungstate
-2
4
-
-3
NO
Nitrate
-1
BO
Borate
-3
3
3
-
-3
NO
Nitrite
-1
PO
Phosphate
-3
2
4
-
-3
MnO
Permanganate
-1
PO
Phosphite
-3
4
3
-
-3
HSO
Bisulfate
-1
AsO
Arsenate
-3
4
4
-
-3
HSO
Bisulfite
-1
AsO
Arsenite
-3
3
3
-
IO
Iodate
-1
3
-
IO
Periodate
-1
4
-
C
H
COO
Benzoate
-1
6
5
Symbol
Name
Charge
-1
H
PO
Dihydrogen phosphate
-1
2
4
-2
HPO
Hydrogen phosphate
-2
4
-3
Fe(CN)
Hexacyannoferrate (III)
-3
6
-4
Fe(CN)
Hexacyannoferrate (II)
-4
6
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