An improbable electronic configuration is:
Correct answer: A. [Ar]3d44s2
- A. [Ar]3d44s2
- B. [Ar]3d54s1
- C. [Ar]3d64s2
- D. [Ar]3d104s1
Explanation
An electron must be excited to 3d from 4s sub-shell as half filled subshells are more stable hence this configuration {[Ar]3d4,4s2} is improbable.
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