Chromium has the electronic configuration 4s13d5 rather than 4s23d4 because

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4s and 3d have the same energy

4s has a higher energy than 3d

4s1 is more stable than 4s2

4s13d5 half-filled is more stable than 4s23d4

answer is D.

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Detailed Solution

Cr has [Ar]4s13d5 electronic configuration because half filled orbital are more stable than other orbitals.

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