Valences of Common Monatomic and Polyatomic Ions


Common Monatomic Cations
Valence
Name
Ion
1+
Cesium
Cs+
Hydrogen
H+
Lithium
Li+
Potassium
K+
Sodium
Na+
Silver
Ag+
2+
Barium
Ba2+
Beryllium
Be2+
Cadmium
Cd2+
Calcium
Ca2+
Magnesium
Mg2+
Manganese
Mn2+
Nickel
Ni2+
Strontium
Sr2+
Zinc
Zn2+
3+
Aluminum
Al3+


Common Monatomic Anions
Valence
Name
Ion
1-
Bromide
Br-
Chloride
Cl-
Fluoride
F-
Hydride
H-
Iodide
I-
2-
Oxide
O2-
Sulfide
S2-
3-
Nitride
N3-
Phosphide
P3-


Common Type II Cations
Name
Ion
Chromium(II)
Cr2+
Chromium(III)
Cr3+
Chromium(VI)
Cr6+
Cobalt(II)
Co2+
Cobalt(III)
Co3+
Copper(I)
Cu+
Copper(II)
Cu2+
Iron(II)
Fe2+
Iron(III)
Fe3+
Lead(II)
Pb2+
Lead(IV)
Pb4+
Mercury(I)
Hg22+
Mercury(II)
Hg2+
Tin(II)
Sn2+
Tin(IV)
Sn4+


Common Polyatomic Ions
Name
Ion
Ammonium
NH4+
Mercury(I)
Hg22+
Acetate
C2H3O2-
Bromate
BrO3-
Carbonate
CO32-
Hydrogen Carbonate (or Bicarbonate)
HCO3-
Hypochlorite
ClO-
Chlorite
ClO2-
Chlorate
ClO3-
Perchlorate
ClO4-
Dichromate
Cr2O72-
Chromate
CrO42-
Thiocyanate
SCN-
Cyanide
CN-
Hydroxide
OH-
Iodate
IO3-
Nitrite
NO2-
Nitrate
NO3-
Oxalate
C2O42-
Permanganate
MnO4-
Peroxide
O22-
Phosphate
PO43-
Hydrogen Phosphate
HPO42-
Dihydrogen Phosphate
H2PO4-
Silicate
SiO42-
Sulfite
SO32-
Sulfate
SO42-
Hydrogen Sulfate (or bisulfate)
HSO4-
Hydrogen Sulfide
HS-
Thiosulfate
S2O32-
Tartate
C4H4O62-
Tetraborate
B4O72-