Chart of Common Ions/Ionic Charges
POSITIVE IONS (CATIONS)
NEGATIVE IONS (ANIONS)
3+
-
Aluminium
Al
Acetate
CH
COO
3
+
-
Ammonium
NH
Bromide
Br
4
2+
2-
Barium
Ba
Carbonate
CO
3
2+
-
Cadmium
Cd
Hydrogen carbonate, bicarbonate
HCO
3
2+
-
Calcium
Ca
Chlorate
ClO
3
2+
-
Chromium (II), *
Cr
Chloride
Cl
3+
-
Chromium (III), chromic
Cr
Chlorite
ClO
2
2+
2-
Cobalt (II)
Co
Chromate
CrO
4
+
2-
Copper (I), *cuprous
Cu
Dichromate
Cr
O
2
7
2+
-
Copper (II), cupric
Cu
Fluoride
F
+
+
-
Hydrogen
H
, H
O
Hydroxide
OH
3
2+
-
Iron (II), *ferrous
Fe
Hypochlorite
ClO
3+
-
Iron (III), ferric
Fe
Iodide
I
2+
-
Lead (II)
Pb
Nitrate
NO
3
+
-
Lithium
Li
Nitrite
NO
2
2+
2-
Magnesium
Mg
Oxalate
C
O
2
4
2+
Manganese (II)
Mn
2+
-
Mercury (I), * mercurous
Hg
Perchlorate
ClO
2
4
2+
-
Mercury (II), mercuric
Hg
Permanganate
MnO
4
2+
3-
Nickel
Ni
Phosphate
PO
4
+
2-
Potassium
K
Hydrogen phosphate
HPO
4
3+
-
Scandium
Sc
Dihydrogen phosphate
H
PO
2
4
+
2-
Silver
Ag
Sulphate
SO
4
+
2-
Sodium
Na
Silicate
SiO
3
2+
-
Strontium
Sr
Hydrogen sulphate, bisulphate
HSO
4
2+
2-
Tin (II), *stannous
Sn
Sulphide
S
4+
-
Tin (IV), stannic
Sn
Hydrogen sulphide, bisulphide
HS
2+
2-
Zinc
Zn
Sulphite
SO
3
-
Hydrogen sulphite, bisulphite
HSO
3
-
Cyanide
CN
adapted from
Judith S. Nuño
1
2003/2003
Chemistry Ion Chart