Determine why electrons are assigned to specific orbitals, s, p, d, f. Discuss attraction and repulsion forces found between nuclear protons and electrons. View and discuss an electron cloud diagram for lithium which shows the penetration of electrons from higher energy levels into lower ones, and discuss the radial probability curve for fining the electron in orbit. Discuss the different methods of presenting the electron configuration of an atom. Introduce the spdf notation, the orbital box notation and the noble gas configuration notation.