The magnetic quantum number for the outermost electron in sodium atom is:

- 2

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0

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+ 1

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- 1

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Solution

The correct option is D $0$
The configuration of sodium is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ . The outermost electron is in s orbital. For s-orbital, azimuthal quantum no. $l = 0$ .

We know that magnetic quantum no., $m = - l t o l$

$∴$ For $l = 0 \Rightarrow m = 0$

Hence, the correct option is B.

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