## electrons in an atom

Natalie 3k
Posts: 61
Joined: Wed Sep 30, 2020 10:11 pm

### electrons in an atom

Can someone please explain how to find the number of electrons in an Atom based on the Quantum number? I'm getting stuck on what the l means and how it factors into how many electrons there are. Thank you!

Eliana Witham 2H
Posts: 65
Joined: Wed Sep 30, 2020 9:48 pm
Been upvoted: 2 times

### Re: electrons in an atom

L indicates the particular subshell. 0 corresponds to s, 1 corresponds to p, and so on. If you know the values for l and n, then you know how many electrons are possible for that atom. For example, if l=2, then you know the atom reaches the d subshell. You then know that there are 5 orbitals for the d subshell, and 2 possible electrons per orbital, so 10 electrons total in this subshell only.

Caelin Brenninkmeijer 1G
Posts: 60
Joined: Wed Sep 30, 2020 9:50 pm

### Re: electrons in an atom

L signifies the orbital type. So each energy level (n) specifies the size of the orbital and the angular momentum (l) signifies the shape of the orbital. If the atomic orbital is s, the value of l is 0. For p: l=1, for d: l=2, f: l=3, and so on so forth. Hope this helps!