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Electron Configuration Clarification

Posted: Fri Oct 19, 2018 4:26 pm
by Kathryn 1F
In class today (Lecture 3), Lavelle said that an electron could not have the configuration (1,1,0). I am confused, why not?

Re: Electron Configuration Clarification

Posted: Fri Oct 19, 2018 4:29 pm
by MadisonB
I believe this is because "l" has to be n-1. n=the first quantum number, and l=the second quantum number.

Re: Electron Configuration Clarification

Posted: Fri Oct 19, 2018 5:06 pm
by Kevin Tang 4L
Madison is correct,

The first quantum number (n) is a positive integer (0,1,2,3 .....)
The second quantum number (l) is any positive integer that is less than n, thus (0,1,2,3..... n-1)

The reason why (1,1,0) doesn't work is because n=1, which means the only value possible for l can be 0. If n=2, then the l-value could be 0 or 1.