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Chromium has the electronic configuration 4s^{1}3d^{5} rather than 4s^{2}3d^{4} because

Option: 1

4s and 3d have the same energy


Option: 2

4s has a higher energy than 3d


Option: 3

4s^{1} is more stable than 4s^{2}


Option: 4

4s^{1}3d^{5}  is more stable than 4s^{2}3d^{4}


Answers (1)

best_answer

The electronic configuration of Cr is [Ar]4s^13d^5

This is because the half filled d orbital configuration is more stable than the corresponding [Ar]4s^23d^4.

The haf filled orbital configuration is generally more stable due to more number of exchanges in the electrons which leads to more exchange energy and also due to symmetrical distribution of electrons

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chirag

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