Which electronic configuration is most stable?

3 d^{2} 4 s^{0}

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3 d^{0} 4 s^{1}

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3 d^{5} 4 s^{1}

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3 d^{1} 4 s^{2}

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Solution

The correct option is C $3 d^{5} 4 s^{1}$
Stability is maximum when orbitals are half filled or fulfilled.
Here, the electronic configuration $3 d^{5} 4 s^{1}$ is most stable as both the orbitals are half filled.

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