Energy of Multi-Electron Atoms 0 (e t c.) 4p 3d 3p E 23 2p due to shielding,orbitals with the same principal quantum number(n)do NOT have the same energies 1s IV-131s 2s 2p 3s 3p 5s 4p 3d Energy of Multi-Electron Atoms 4s E (e t c.) 0 due to shielding, orbitals with the same principal quantum number(n) do NOT have the same energies IV-13