## Quantum number M [ENDORSED]

Tatiana 4B
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### Quantum number M

If Quantum number L can be more than one value, then do we figure out the possible M values based on the highest number L could be?

Jessica Chen 1F
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Joined: Fri Sep 28, 2018 12:17 am

### Re: Quantum number M

You can determine how many values of Ml there are based on the number of L through the equation M = (2L + 1)

For example, if L = 1, there are (2(1)+1) = 3 values of M and they are -1, 0, +1
if L = 2, there are (2(2)+1) = 5 values of M and they are -2, -1, 0, +1, +2
and so on.

Linyu Zeng 1H
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Joined: Fri Sep 28, 2018 12:19 am

### Re: Quantum number M

the values of M associated with each L can be determined separately. Just take the integers between + and - values of L.

Bianca Barcelo 4I
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### Re: Quantum number M

Can anyone clarify the meaning/concept of quantum number m?

Joon Chang 2F
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Joined: Fri Sep 28, 2018 12:25 am

### Re: Quantum number M

Bianca Barcelo 1G wrote:Can anyone clarify the meaning/concept of quantum number m?

Quantum number ms is the spin magnetic quantum number. It represents the spin state of the electron, which can be thought of as the electron spinning either clockwise or counterclockwise. It basically indicates what direction the electron is spinning in.
Last edited by Joon Chang 2F on Fri Oct 19, 2018 9:58 pm, edited 1 time in total.

Julia Go 2L
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### Re: Quantum number M

The quantum number ml is the magnetic quantum number. It indicates the orientation of an orbital around the nucleus. The values of m depend on l.

For example, if l=1, then m = -1,0,1

There are three possible values for m, which means that there are 3 different orientations. (px, py, pz)

Rian Montagh 2K
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### Re: Quantum number M  [ENDORSED]

To respond to the first question, l can be different numbers so if you only have n=2, then l can be 0 or 1. So I think it would make sense to choose the higher l so that you include the widest range of m values that cover all the possibilities of m.

bonnie_schmitz_1F
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### Re: Quantum number M

In the M number, does -1 always correspond to x? For example is wave function (2,1, -1) have to mean 2px? or could it be 2py?