Which of the following sets of quantum number is not possible for an electron in the ground state of an atom with atomic number 19 ?
a.n =2, l =1, m = 0
b.n=2, l =0, m =0
c.n =3, l =1, m = -1
d.n=3, l =2, m = + (or) – 2
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Explanation:
For the s subshell, l=0and for the p subshell, l=1. Thus, the third set of quantum members is notallowed as it implies electron in a d subshell (l=2).
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