## Determining electrons

Maggie Doan 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:24 am

### Determining electrons

How do you find the possible number of electrons given by quantum numbers?

Ex: n=2, l= 1
n=4, l=0, ml=-2, ms= -1/2

Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
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### Re: Determining electrons

There are 2 electrons (up/down spin) per magnetic quantum.

So for example n=2 l=1
Ml = -1,0,1
so for each of these three there are 2 electrons. So in this case it's a total of 6 electrons.

For n=4 ... ms=-1/2
It is only 1 electron because they gave you all four quantum numbers and no 2 electrons in the same atom can have the exact same quantum numbers.

Erica Li 1C
Posts: 31
Joined: Fri Sep 28, 2018 12:17 am

### Re: Determining electrons

You look at the number of orbitals in a given subshell and then multiply it by 2 since there are 2 electrons in each orbital
(so if l=2, there are 5 orbitals, meaning 10 electrons)

keyaluo4C
Posts: 54
Joined: Fri Sep 28, 2018 12:17 am

### Re: Determining electrons

I find it easiest to think of it as shell, subshells, and orbitals.
Ex: n=2, l= 1
n = 2 means it is in the 2nd shell and l = 1 means it must be in the p orbital. There are 6 possible electrons in the 2p orbital.

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