Charges of some Common Ions

CHARGES OF SOME COMMON IONS

I A

II A

I B

II B

III A

IV A

V A

VI A

VII A

H⁺

Li⁺

Be⁺²

N^-3

O^-2

F^-

Na⁺

Mg⁺²

Al⁺³

P^-3

S^-2

Cl^-

K⁺

Ca⁺²

Cr⁺²

Cr⁺³

Mn⁺²

Fe⁺²

Fe⁺³

Co⁺²

Co⁺³

Ni⁺²

Cu⁺¹

Cu⁺²

Zn⁺²

Br^-

Rb⁺

Sr⁺²

Ag⁺¹

Cd⁺²

Sn⁺²

Sn⁺⁴

I^-

Cs⁺

Ba⁺²

Hg₂⁺²

Hg⁺²

Pb⁺²

Bi⁺³

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Group IA elements all form single positvely charged ions. Group IIA elements form doubly charged positive ions. Elements in the transition metal group are frequently able to form cations with different charges. Note the unusual formula for the mercury (I) ion. Caions with a +4 charge are very uncommon and are usually unstable in solution. The first four group VIA elements all form anions with a double negative charge. Group VIIA elements all form anions with a single negative charge.