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NEETChemistryd and f Block Elements

Which of the following element does not ([ Ar ] 3 ~d ^5 ) in its electronic configutation. (A) Cr (B) Fe (C) Mn (D) Ni

Options

  1. AIf A, B and C options are correct.
  2. BIf A & B both options are correct.
  3. CIf B & D both are options correct.
  4. DIf A & C both are options correct.

Correct answer

C. If B & D both are options correct.

Step-by-step solution

The electronic configurations of the given elements are: (A) ( Cr :[ Ar ] 3 ~d 54 ~s 1 ) (B) Fe: ([ Ar ] 3 ~d 64 ~s 2 ) (C) ( Mn :[ Ar ] 3 ~d 54 ~s 2 ) (D) Ni : [Ar]3d8 4s2 The question asks which element does not have [Ar]3d5 in its electronic configuration. The answer is Ni, which has [Ar]3d8.

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