Quantum numbers and electrons

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205323697
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Joined: Tue Feb 25, 2020 12:15 am

Quantum numbers and electrons

Postby 205323697 » Sun Oct 25, 2020 11:13 pm

What does it mean when we have two electrons that share the same quantum numbers? Does This even occur? Why or Why not?

Sam Wentzel 1F 14B
Posts: 80
Joined: Wed Sep 30, 2020 9:50 pm
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Re: Quantum numbers and electrons

Postby Sam Wentzel 1F 14B » Sun Oct 25, 2020 11:28 pm

Electrons can have some of the same quantum numbers, but not all (or else you are referring to the same electron both times).

For example, let's take electrons in the 2s^2 subshell.
Here, n = 2 for both electrons.
l = 0 for both electrons.
ml = 0 for both electrons.

However, the electrons will ALWAYS have a different spin quantum number, ms, if they are indeed different electrons.

The upward spinning electron will have an ms value of: +1/2
The downward spinning electron will have an ms value of: -1/2

We will learn more about how spin plays a role in electron pairing next week I believe :D.

Hope this helps!

Linette Choi 3L
Posts: 60
Joined: Wed Sep 30, 2020 9:51 pm

Re: Quantum numbers and electrons

Postby Linette Choi 3L » Sun Oct 25, 2020 11:30 pm

No two electrons in the same atom can have the same 4 quantum numbers as the numbers completely specify an electron's orbital and spin state in the atom.


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