## Magnetic Quantum Number (orientation)

Farah Abumeri 3F
Posts: 66
Joined: Wed Sep 30, 2020 9:51 pm
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### Magnetic Quantum Number (orientation)

How do you determine the magnetic quantum numbers specifically? For instance, if l=2, I understand that there are 5 options for a magnetic orientation quantum number because there are 5 d-orbitals. Those 5 numbers are -2,-1,0,1,2. How do we know that it goes from -2 to 2?

Lauren Mungo 1K
Posts: 60
Joined: Wed Sep 30, 2020 10:08 pm

### Re: Magnetic Quantum Number (orientation)

This is because we know l=2 and ml is equal to the values between -l and l. So we know it would take the values of 2 to -2. So for the p orbital l=1 so ml= -1, 0, 1

Mikayla Kwok 3K
Posts: 63
Joined: Wed Sep 30, 2020 9:51 pm

### Re: Magnetic Quantum Number (orientation)

I just wanted to add that we don't know which magnetic quantum number represents which orientation unless the problem assigns specific magnetic quantum numbers to specific orbital. For instance, one problem may say ml = 0 is the px orbital, while another may say ml = 0 is the py orbital.