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Question 21084
NEET Chemistry · Medium

Structure of Atom: Electronic configuration MCQ

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Electronic configurationMediumQuestion 21084

Question

Electronic configuration of copper is exceptional because it is:

  1. A
    [Ar]3d104s1[Ar]3d^{10}4s^1
    Correct
  2. B
    [Ar]3d94s2[Ar]3d^94s^2
  3. C
    [Ar]3d84s3[Ar]3d^84s^3
  4. D
    [Ar]3d104s2[Ar]3d^{10}4s^2

Correct answer

[Ar]3d104s1[Ar]3d^{10}4s^1

Explanation

Completely filled d-subshell gives additional stability.

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