Valency of ions

Sodium

Na+

Potassium

K+

Silver

Ag+

Copper(I)

Cu+

Hydrogen

H+

Hydride

H-

Chloride

Cl-

Bromide

Br-

Iodide

I

Ammonium

Nh4+

Hydroxide

OH

Nitrate

No3

Carbonate

HCO3

Magnesium

Mg(2)+

Calcium

Ca(2)+

Zinc

Zn(2)+

Iron(II)

Fe(2)+

Copper(II)

Cu(2)+

Oxide

O(2)-

Sulphide

S(2)-

Carbonate

Co(2)

Sulphite

So3(2)

Sulphate

So4(2)

Aluminium

Al(3)+

Iron(III)

Fe(3)+

Nitride

N(3)-

Phosphate

Po4(3)