Zinc (Zn)



Group IIB (z) = At. No.

Zn        30        Zn  = [Ar] 3d104S2; Zn +2 = [Ar] 3d10

Cd       48

Hg       80

Configuration : (n-1) d10 ns2

The element Zn, Cd and Hg forms group IIB of the periodic table. These elements do not have partially filled d. orbitals both in metal and metal ion. So, they do not exhibit general properties of transition metals and are called non- tipical transition metal.

 

Occurrence:

 

Zinc occurs in nature only in combined state. The main ores of zinc are:

Zinc blende – ZnS

Calamino – ZnCO3

Zincite – ZnO

Franklinite – ZnO. Fe2O3

Willimite – 2ZnO. SiO2