Maximum value of ( n +l+m) for unpaired electrons in second excited state of chlorine ₁₇Cl is

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Solution

The correct option is B
25

Configuration in second excited state is written as

$\begin{matrix} N & 3 & 3 & 3 & 3 & 3 1 & 1 & 1 & 1 & 2 & 2 m & - 1 & 0 & + 1 & + 2 & + 1 \end{matrix}$

Total $n + l + m = 25$

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