In the series Sc(Z=21) to Zn (Z= 30) the enthalpy of atomization of zinc is the lowest  i.e. 126 Kj /mol. Why?

In case of zinc its outer d-subshell is fully filled. So it can not make interatomic bonds like the other elements of the same transition series. The other elements with partially filled d-subshell can undergo multiple metallic bonds . Thus the enthalpy of atomization in case of Zinc ix the lowest.

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