AP Chemistry

Which of the following sets of quantum numbers are allowed for an electron in a hydrogen atom?
a)n=3, l=0, ml=0
b)n=4,l=1,ml=-1
c)n=2,l=1,ml=-2

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  1. a. n can be 3 for an excited H atom; l can be 2,1,0; ml can be 0. OK for a.

    b. n can be 4 for an excited H atom; l can be 3,2,1,0; ml can be -1,0,+1. OK for b.

    c. n can be 2 for an excited H atom. l can be 1,0. mL can be -1,0,+1 but not -2. not OK. c is out.

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