Correct set of four quantum numbers for valence electron, Chemistry

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Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is:

(1)  5,0,0,+1/2                   

(2)  5, 1,0,+1/2   

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

(4) 6,0,0,+1/2    

Ans:  5,0,0,+1/2           

 


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