Question

Explain:

Zn, Cd and Hg are normally not considered as transition metals.

Answer 1

The electronic configurations of Zn, Cd and Hg are represented by the general formula (n-1)d10 ns2. The orbitals in these elements are completely filled in the ground state as well as in their common oxidation states. Therefore, they are not regarded as transition elements.

Answer 2

Transition elements are the elements whose atoms or simple ions contain partially filled d- orbitals.

Zn, Cd, and Hg are normally not considered as transition metals as they contain completely filled d - orbitals in their elementary and commonly occuring ions.


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