Lecture
This lecture covers the wave function of the hydrogen atom, emphasizing the probability density and spherical shape of different energy states. It also delves into the angular momentum of the atom, discussing the invariance under rotations, eigenstates, and the Zeman effect. Furthermore, it explores the concept of electron spin, its physical origin, and the implications on the atom's energy levels. The lecture concludes by posing open questions related to atomic and molecular physics.