Structure of Atom - Result Question 38

####42. The correct set of four quantum numbers for the valence electron of rubidium atom (Z=37) is

[2012]

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

(b) 6,0,0,+1/2

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

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

Show Answer

Solution:

  1. (c) Electronic configuration of Rb=[Kr]5s1

Set of quantum numbers, n=5

ℓ=0,∴s-orbital

m=0,s=+1/2

The other possible answer is 5, 0, 0, - 1/2 In and orbital any electron can take the value of ±1/2 and the other elctron of the same orbital, takes the value with opposite sign.

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