KMBT 654-20131118121126 - Berger's Chemistry Class ELECTRON CONFIGURATION (LEVEL ONE) Name Electrons are distributed in the electron cloud into principal energy levels (1 , 2,3 ) sublevels (s, p, d, f), orbitals (s has I , p has 3, d has 5, f has 7) and spin (two electrons allowed per orbital), Example: Draw the electron configuration of sodium (atomic #11). Answer: 1s2 2S2. Draw the electron configurations of the following atoms, ©lnstructional Fair, Inc. 3, 4, , Inco a O 29 Chemistry.