For the valency electron in copper, the ...

For the valency electron in copper, the four quantum numbers are

A

`n=4l=0m=0s=+1//2`

B

`n=4l=2m+2=-1//2`

C

`n=4l=-2 m=2s=+1/2`

D

`n=4l=2m=0s=+1/2`

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The correct Answer is:

A

The valence electronic configuration of copper is `3d^(10) 4s^(1)`
Hence `n=4 l=0 m=0 s=+1//2`

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