WJEC A-Level Chemistry Valency Table

Silver

Ag⁺

Aluminium

Al³⁺

Negative ions

Anions

Beryllium

Be²⁺

Bromine

Br⁻

Carbonate

CO₃²⁻

Positive ions

Cations

Calcium

Ca²⁺

Chlorine

Cl⁻

Chromium(III)

Cr³⁺

Chromium

Cr⁶⁺

Copper(II)

Cu²⁺

Copper(I)

Cu⁺

Carbide

C⁴⁻

Iron(II)

Fe²⁺

Iron(III)

Fe³⁺

Fluoride

F⁻

Hydrogen carbonate (Bicarbonate)

HCO₃⁻

Hydrogen sulfate

HSO₄⁻

Mercury(II)

Hg²⁺

Hydrogen

H⁺

Iodine

I⁻

Potassium

K⁺

Lithium

Li⁺

Magnesium(II)

Mg²⁺

Manganese(II)

Mn²⁺

Manganese(IV)

Mn⁴⁺

Ammonium

NH₄⁺

Nitrite

NO₂⁻

Nitrate

NO₃⁻

Sodium

Na⁺

Nitride

N³⁻

Hydroxide

OH⁻

Oxide

O²⁻

Phosphate

PO₄³⁻

Lead(II)

Pb²⁺

Lead(IV)

Pb⁴⁺

Phosphide

P³⁻

Sulfite

SO₃²⁻

Sulfate

SO₄²⁻

Silicide

Si⁴⁻

Sulfide

S²⁻

What are Valencies?

Valency is the number of atoms in which any single atom or group of atoms can chemically unite.

Vanadium

V⁵⁺

Zinc

Zn²⁺