Choose the correct option:
The electron configuration of Mg is :

1 s^{2} 2 s^{2} 2 d^{6} 3 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}

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1 s^{2} 2 d^{2} 2 p^{6} 3 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{3}

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Solution

The correct option is C $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$
The electronic configuration of Mg is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}

The correct electronic configuration of $V^{2 +}$ is:

The electronic configuration of Ti is 1 $s^{2}$ 2 $s^{2}$ 2 $p^{6}$ 3 $s^{2}$ 3 $p^{6}$ 3 $d^{2}$ 4 $s^{2}$ and it represents

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}

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