So we know that all matter is made up of atoms, but what is an atom made out of? Chemists describe the structure of atoms using models. This section will cover the Bohr model, photoelectric effect, absorption and emission spectra, quantum numbers, and electron configurations.

This resource contains 2 video lectures related to quantum theory and quantum numbers.  A variety of problem types involving quantum numbers are presented. These videos correspond to Chemistry Atoms First 2e, Section 3.3https://openstax.org/books/chemistry-atoms-first-2e/pages/3-3-development-of-quantum-theory