Question
For Rb(37) which of the following set of quantum numbers are correct for valence electron?
Options :
5, 0, 0, +(1/2)
5, 0, 1, -(1/2)
5, 0, 1, +(1/2)
5, 1, 1, +(1/2)
Answer :
5, 0, 0, +(1/2)
Solution :
37Rb = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s1
Last electron enters in 5s subshell
Value of quantum numbers
n = 5, l = 0, m = 0, s = ±(1/2)
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