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NEETChemistryd and f Block Elements

In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinc is the lowest, i.e., 126 kJ mol –1 . Why?

Options

  1. Abecause in the formation of metallic bonds, no electrons from 3d-orbitals are involved in the case of zinc unl
  2. Bbecause Zinc has a smaller atomic radius compared to scandium.
  3. Cbecause Zinc has a completely filled d-subshell in its ground state electron configuration.
  4. Dbecause Zinc exhibits fewer oxidation states compared to scandium.

Correct answer

A. because in the formation of metallic bonds, no electrons from 3d-orbitals are involved in the case of zinc unl

Step-by-step solution

Correct Option is : (A) because in the formation of metallic bonds, no electrons from 3d-orbitals are involved in the case of zinc unlike the rest of the series

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