Quantum numbers for an electron of an atom is not possible, Chemistry

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Which set of quantum numbers for an electron of an atom is not possible:

(1) n=1 l=0, m=-0, s= +1/2  

(2) n=1, l=1, m=-1, s= +1/2 

(3)  n=1, l=0, m=0, s= -1/2  

(4) n=2 l=1, m=-1, s= +1/2

Ans: n=1, l=1, m=-1, s= +1/2

 


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