Question

For Rb(37) which of the following set of quantum numbers are correct for valence electron?

Options :

  1. 5, 0, 0, +(1/2)

  2. 5, 0, 1, -(1/2)

  3. 5, 0, 1, +(1/2)

  4. 5, 1, 1, +(1/2)

Show Answer

Answer :

5, 0, 0, +(1/2)

Solution :

37Rb = 1s2 2s2p6 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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