Chromium has the electronic configuration 4s13d5 rather than 4s2 3d4 because

4s 1 3d 5 half-filled is more stable than 4s 2 3d 4

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Chromium has the electronic configuration 4s¹3d⁵ rather than 4s² 3d⁴ because

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4s¹3d⁵ half-filled is more stable than 4s²3d⁴

4s has a higher energy than 3d

4s and 3d have the same energy

4s¹ is more stable than 4s²

answer is D.

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

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