TABLE OF COMMON IONS (6/02/03)

Valence or

Oxidation State

Positive Ions

(The indication ion is required)

Negative Ions

(The indication ion is redundant and not required)

Charge = 1 (one)

H⁺¹ 

Li⁺¹ 

Na⁺¹ 

K⁺¹ 

Cs⁺¹

Hydrogen ion 

Lithium ion 

Sodium ion 

Potassium ion 

Cesium ion

NH₄⁺¹ 

Ag⁺¹ 

Cu⁺¹ 

 

Hg₂⁺² 

Ammonium ion 

Silver ion 

Cuprous ion or

Copper (I) 

Mercurous ion or

Mercury (I)

H^-1

F^-1 

Cl^-1

Br^-1 

I^-1

NO₂^-1

NO₃^-1

Hydride ion

Fluoride ion 

Chloride ion

Bromide ion 

Iodide ion

Nitrite ion

Nitrate ion

CN^-1

OH^-1 

C₂H₃O₂^-1

ClO₃^-1

BrO₃^-1

ClO₄^-1

MnO₄^-1

HCO₃^-1

Cyanide ion

Hydroxide ion 

Acetate ion

Chlorate ion

Bromate ion

Perchlorate ion

Permanganate ion

Bicarbonate ion

(Hydrogen carbonate)

Charge = 2 (two)

Mg⁺²

Ca⁺²

Sr⁺²

Ba⁺² 

Cd⁺²

Zn⁺²

Pb⁺²

Magnesium ion

Calcium ion

Strontium ion

Barium ion 

Cadmium ion

Zinc ion

Lead (II) ion or

Plumbous ion

Cu⁺² 

Hg⁺² 

Mn⁺² 

Fe⁺² 

Sn⁺²

Cupric ion or

Copper (II) ion

Mercuric ion or

Mercury (II) ion

Manganese (II) ion

or Manganous ion

Ferrous ion or

Iron (II) ion

Tin (II) ion

Stannous ion

O^-2 

S^-2 

SO₃^-2 

SO₄^-2 

CO₃^-2

Oxide ion 

Sulfide ion 

Sulfite ion 

Sulfate ion 

Carbonate

ion

CrO₄^-2 

Cr₂O₇^-2 

SeO₃^-2 

SeO₄^-2 

Se^-2

Chromate ion 

Dichromate ion 

Selenite ion 

Selenate ion 

Selenide

Charge = 3 (three)

Al⁺³

Fe⁺³

Aluminum ion

Ferric ion or

Iron(III)

Sb⁺³

Antimony (III) ion or Antimonous ion

N^-3

P^-3

PO₄^-3

Nitride ion

Phosphide

Phosphate ion

AsO₃^-3

AsO₄^-3

Arsenite ion

Arsenate ion

These elements often show the following oxidation states (charges), but not as simple monoatomic atoms: Lead +4, Tin +4, Boron +3, Arsenic +3 & +5, Carbon +4 & -4, Silicon +4 tes 6/2/2003