1. Comparison of Koopmans’ Theorem with exp.
Ionization Energies
from McQuarrie & Simon: Physical Chemistry

2. Atomic Structure and Term Values
En increases with n
at constant n, greater ℓ means more “circular” orbit  more screening of nuclear charge  Enℓ increases with ℓ
order of orbitals depends on Z: e.g. 3d < 4s for Z < 7 3d > 4s for 7≤ Z ≤ 21
from I. Levine: Quantum Chemistry

3. Angular momentum in multielectron atoms:
”total orbital angular momentum”
from McQuarrie & Simon: Physical Chemistry