The outermost electronic configuration of $C r$ is _____.

{3 d}^{5} {4 s}^{2}

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

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

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

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Solution

The correct option is B ${3 d}^{5} {4 s}^{1}$
Chromium has an atomic mass of 24 with an outer configuration of $4 s^{1} 3 d^{5}$ .

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4 s^{2}

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