What is the electron configuration for chlorine?

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}

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[A r] 4 s^{1}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}

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1 s^{2} 2 s^{2} 2 p^{5} 3 s^{2} 3 p^{5}

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Solution

The correct option is A $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}$
The atomic number of Chlorine ( $C l$ ) is $17$ . Thus its electronic configuration is $[N e] 3 s^{2} 3 p^{5}$ or $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}$ . Thus the answer is option A.

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