A transition metal ' $X$ ' has a configuration $[A r] 3 d^{4}$ in its $+ 3$ oxidation state, its atomic number is:

25

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26

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22

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19

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Solution

The correct option is B $25$
Goal:- Electronic configuration
$X^{+ 3} [A r] 3 d^{4}$
$A t o m i c n o = 18 + 4 + 3$
$= 25$

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3 d^{4}

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An element has $[A r] 3 d^{4}$ configuration in its +3 oxidation state. The atomic number of element is:

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