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Ionization Energies

Account for: ...

Question

Account for: $Z n$ has lowest enthalpy of atomisation in $3 d$ series.

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Solution

Because in the formation of metallic bonds no electron from $3 d$ orbitals are onvolved in case of zinc as it has completely filled $d$ -orbitals ( $3 d^{10} 4 s^{2}$ ), while in all other metals of $3 d$ series electrons from the $d$ -orbitals are always involved in the formation of metallic bonds.

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Q. Account for the following:
(i) In the series Sc to Zn, the enthalpy of atomisation of zinc is the lowest.
(ii)

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