1.

If there are three possible values (-1//2,0,+1//2) for the spin quantum, then electronic configuration of K (19) will be:

Answer»

`1S^(3),3s^(3)2p^(9),3s^(2)3p^(1)`
`1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),4s^(1)`
`1s^(2),2s^(2)2p^(9),3s^(2)3p^(4)`
none of these

Answer :A


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