The electronic configuration of valence shell of Cu is 3d104s1 and not 3d94s2 . How is this configuration explained?

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Structure of Atoms Ncert Solutions Chemistry Class 11th Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Two

The electronic configuration of valence shell of Cu is 3d¹⁰4s¹ and not 3d⁹4s² . How is this configuration explained?

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Vishal Baghel | Contributor-Level 10

4 months ago

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: As per the Hund's rule the half filled and fully filled orbital leads to the extra stability due to the symmetry thus fully filled 3d and half filled 4s is preferred.

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