The electron configuration of $N a$ is ______________.

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

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

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

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

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Solution

The correct option is A $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
$_{11} N a = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$

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