This lecture covers the angular wave functions of the hydrogen atom, including the angular momentum, spherical harmonics, and associated legend functions. It explains how the azimuthal quantum number determines the orbital shape and the possible values of m. The lecture also delves into the electronic structure of atoms, discussing the energy levels, orbital sublayers, and the spin quantum number. It concludes with a summary of the electronic structure of the hydrogen atom and the key concepts related to angular wave functions.