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Correct ground state electronic configur...

Correct ground state electronic configuraton of Cr is:

A

`[Ar] 3 d "^4 4s^2`

B

`[Ar] 3d^5 4s^1`

C

`[Ne] 3 d^5 4s^1`

D

`[Ne] 3d^24 4s^2`.

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