1.

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

Answer»

`3,1,0,1/2`
`3,1,1,1/2`
`3,2,1,1/2`
`3,0,0,1/2`

SOLUTION :The electronic configuration of Na(Z=11) is`1s^(2)2S^(2)2P^(6)3s^(1)`. The outermost orbital is 3s.
`:.n=3, l=0, m=0, s=+1/2`


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