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Why do the transition elements exhibit higher enthalpies of atomisation and why is enthalpy of atomisation of zinc  lowest in the 3d series?

Asked by Topperlearning User 26th June 2014, 3:02 PM
Answered by Expert

The value of enthalpy of atomisation increases as the interatomic interaction increases. Further the interatomic interaction is affected by the number of unpaired electrons. The greater the number of unpaired electrons greater is interatomic interaction and greater will be the enthalpy of atomisation. Since transition elements have unpaired electrons they have greater interatomic interaction and exhibit higher enthalpies of atomisation.

Zinc contains no unpaired electrons hence enthalpy of atomisation of zinc is the lowest.
Answered by Expert 26th June 2014, 5:02 PM
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