Question

In first transition series, the melting point of Mn is low because
A. Due to `d^(10)` configuration, metallic bonds are strong
B. Due to `d ^(7)` configuration, metallic bonds are weak
C. Dur to `d^(5)` configuration, metallic bonds are weak
D. none of these

Answer 1

Correct Answer - C
Due to `d^(5)` configuration, metalic bonds are weak. `d^(5)` orbital is half filled as a result 3d electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.