What are some common mistakes students make with orbitals?

1 Answer
Jul 9, 2018

Well, I suppose it would be the following...


Two common mistakes would be:

  • Not knowing which orbitals physically exist AND why they do not.
  • Forgetting the difference between orbitals and subshells.

So, consider the following examples.

  1. Recall that the principal quantum number n = 1, 2, 3, . . . and the angular momentum quantum number l = 0, 1, 2, . . . , ul(n-1).

    Therefore, it follows that if n is some integer, then l can be no greater than n, i.e. 1p, 2d, and 3f orbitals do not exist, etc. because for these, it is NOT the case that l < n, while it must be.

  2. Or, we distinguish between the fact that if you have a set of d orbitals, it does not mean that 10 electrons can go into one orbital...

    But it DOES mean that you can have 10 electrons total in that subshell, as there can be 2 electrons per d orbital, of which there are 5.