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Topic: Magnetic quantum number  (Read 2718 times)

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Offline Rutherford

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Magnetic quantum number
« on: April 14, 2012, 08:39:36 AM »
What are the values of the magnetic quantum number for subshell p(l=1)? Are they -1,0,1 in this sequence?

Offline XGen

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Re: Magnetic quantum number
« Reply #1 on: April 14, 2012, 01:07:14 PM »
I believe yes.

Offline Rutherford

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Re: Magnetic quantum number
« Reply #2 on: April 14, 2012, 02:50:14 PM »
Well, I was doing this problem:
Write the el. configuration of an atom, if his valent electrons have these properties:
n=4, l=0, ml=0, ms=+1/2
n=4, l=0, ml=0, ms=-1/2
n=4, l=1, ml=0, ms=+1/2
I thought that the configuration of the valent electrons would be: 4s2 4p2, but in the answer it is 4s2 4p1. I am really confused. How can that be right?

Offline Borek

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Re: Magnetic quantum number
« Reply #3 on: April 14, 2012, 03:38:22 PM »
There are three electrons listed in the problem, why did you expect four?
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Offline Rutherford

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Re: Magnetic quantum number
« Reply #4 on: April 14, 2012, 04:01:12 PM »
Good point. But how can it be "4p1" if ml is 0? If I draw a p orbital diagram ml=0 is the middle box I suppose. So the ml=-1 box must be filled with 1 electron first and then the middle box.

Offline Borek

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Re: Magnetic quantum number
« Reply #5 on: April 14, 2012, 04:32:44 PM »
No, there is no filling order of this type. We usually draw them starting with the left box, but it is just a meaningless convention.
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Offline Rutherford

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Re: Magnetic quantum number
« Reply #6 on: April 15, 2012, 04:26:56 AM »
Ok, thanks.

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