Atomic StructureHard

Question

Which of the following is electronic configuration of Cu²⁺ (Z = 29) ?

Options

A.[Ar]4s¹ 3d⁸

B.[Ar]4s² 3d¹⁰ 4p¹

C.[Ar]4s¹ 3d¹⁰

D.[Ar]3d⁹

Solution

Cu : 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹.
∴ Cu²⁺ : 1s²2s²2p⁶3s²3p⁶3d⁹ or [Ar]3d⁹.

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