In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinc is the lowest,126 kJ mol^-1. Why?

The enthalpy of atomisation of zinc is lowest because in the formation of metallic bond, no electrons from 3d- orbitals are involved in case of zinc, formation which increases the strength of bond.

In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinc is the lowest,126 kJ mol^-1. Why?

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