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In the series Sc (Z=2) to Zn (Z=30), the...

In the series Sc (Z=2) to Zn (Z=30), the enthalpy of atomisation of zinc is the lowest, i.e., 126kJ `mol^(-1)`. Why?

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In zinc, the d-electrons are not involved in a metallic bonding as d-orbitals are occupied completely, while in all other elements in first transition series, d-electrons participates in metallic bonding. So, Zn hs lowest enthalpy of atomisation
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