1.

The four quantum number for the valence shell electron or last electron of sodium (Z = 11) is [MP PMT 1999]

A. \[n=2,\,l=1,\,m=-1,\,s=-\frac{1}{2}\]
B.                 \[n=3,\,l=0,\,m=0,\,s=+\frac{1}{2}\]
C.                 \[n=3,\,l=2,\,m=-2,\,s=-\frac{1}{2}\]
D.                 \[n=3,\,l=2,\,m=2,\,s=+\frac{1}{2}\]
Answer» C.                 \[n=3,\,l=2,\,m=-2,\,s=-\frac{1}{2}\]


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