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  4. The correct set of four quantum numbers for the outermost electron of sodium (Z = 11) is

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Q. The correct set of four quantum numbers for the outermost electron of sodium ($Z = 11$) is

KCETKCET 2012Structure of Atom

Solution:

$_{11}{ Na} =1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{1}$

For $3 s^{1}$,

$n=3, $

$ l=0, $

$ m=0, $

$ s=\frac{1}{2}$