• For the n = 2 shell, l = 0 and 1. These are labelled as '2s' and '2p' subshells respectively.
  • For the l = 0 subshell, ml = 0 only. This is the 2s orbital:
  • For the l = 1 subshell, ml = -1, 0, +1. There are three 2p orbitals:.