## Energy Levels

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

Posts: 3
Joined: Fri Sep 26, 2014 2:02 pm

### Energy Levels

So when we talk about energy levels and we use n=1, n=2, and n=3, what does this "n" mean?

Posts: 15
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Energy Levels

"n" is the principal quantum level. Each n value represents an orbital with a certain amount of energy. n=1 is closest to the nucleus, and as n increases the energy increases as well since you are getting further and further away from the nucleus. It takes more energy to excite an electron and get it further away from the nucleus.

Posts: 11
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Energy Levels

I had a similar question, except mine was regarding the L and the ml. How do we find these out based on the energy level per say n=3 ??

Do we do n-1?

Franklin Liu 3H
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Energy Levels

L is the angular momentum quantum number and can have values from 0 to n-1 so if the principle quantum number, n=3, L can have the values of 0, 1, and 2. ml is the magnetic quantum number and its values are from L to -L so if n=2 then the values of ml are -2, -1, 0, 1, and 2. Hope this helped!

Justin Le 2I
Posts: 142
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Energy Levels

HimaniMadnawat3A wrote:"n" is the principal quantum level. Each n value represents an orbital with a certain amount of energy. n=1 is closest to the nucleus, and as n increases the energy increases as well since you are getting further and further away from the nucleus. It takes more energy to excite an electron and get it further away from the nucleus.

This is second sentence is actually wrong, n is equal to the shell not the orbital.