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Which element has the lowest atomisation...

Which element has the lowest atomisation energy in 3d - series ? Explain with reasons.

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Zn has completely filled 3d - orbital (electronic configuration : `[Ar]3d^(10)4s^(2)`). As the 3d electrons are paired, they do not take part in metallic bond formation while the other elements with unpaired electrons, form metallic bonds of varying strengths. Therefore, Zn has the lowest atomisation enthalpy.
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