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### Quantum Numbers n, l, and m

Posted: **Thu Oct 25, 2018 7:22 pm**

by **Shuyi Yu 1B**

Can the relationship between n, l, and m be described as shell, sub-shell, and orbital within a sub-shell, respectively? And does the value of l tell you the highest possible sub-shell of that particular energy level?

### Re: Quantum Numbers n, l, and m

Posted: **Thu Oct 25, 2018 7:39 pm**

by **Tarika Gujral 1K**

n = principle energy level (shell), l is angular momentum (subshell), and ml = magnetic quantum (orbital).

The highest value of l is equal n-1

Values of l correspond to subshells: 0-s, 1-p, 2-d, 3-f

### Re: Quantum Numbers n, l, and m

Posted: **Thu Oct 25, 2018 7:39 pm**

by **Nada AbouHaiba 1I**

Yes, that's how they could be described! and the highest possible subshell of a particular shell would be n-1!

Hope this helped!

### Re: Quantum Numbers n, l, and m

Posted: **Sun Oct 28, 2018 1:56 pm**

by **Athena L 1B**

and the fourth quantum number, ms, is either +1/2 or -1/2, and determines whether the electron is spin up or spin down

### Re: Quantum Numbers n, l, and m

Posted: **Sun Oct 28, 2018 2:01 pm**

by **Anjali_Kumar1F**

How do you know if the spin is up or down?

### Re: Quantum Numbers n, l, and m

Posted: **Sun Oct 28, 2018 2:20 pm**

by **mbaker4E**

Spin up is +1/2 and spin down is -1/2.