Hi everyone. In my class we are now learning about Quantum theory & the whole "shananigans". Yesterday we talked about orbitals (s, p, d, f, g). In one of the classes my Physics teacher said that the letter "l" (lowercase L) indicates the sub-shell and "m (sub) l" the location of the orbits in outer space. I get the m (sub) l, but I don't know what the "l" is. What does he mean by the sub-shell? From now on, if it's alright with the Admin on here, I will be posting all my questions in this thread, instead of starting a new one each time (hence, the thread title). Thank you.