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Solution


Q.

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is:             [2024]
1 5, 1, 0, + 12  
2 5, 1, 1, + 12  
3 5, 0, 1, + 12  
4 5, 0, 0, + 12  

Ans.

(4)       

            R37b=[36Kr]5s1  

              For last electron, n=5,l=0,m=0,s=+12 or -12