The four quantum number for the valence shell electron, Chemistry

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The four quantum number for the valence shell electron or last electron of sodium (Z = 11) is:

(1)  n =1, l= 1, m= -1, s= -1/2   

(2) n =3, l=0, m=0, s= +1/2  

(3) n =3, l= 2, m= -2, s= -1/2       

(4) n =3, l= 2, m= 2, s= +1/2

Ans: n =3, l=0, m=0, s= +1/2

 


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