30.1 Discovery of the Atom

30.2 Discovery of the Parts of the Atom: Electrons and Nuclei

30.5 Applications of Atomic Excitations and De-Excitations

30.6 The Wave Nature of Matter Causes Quantization

30.7 Patterns in Spectra Reveal More Quantization

30.8 Quantum Numbers and Rules

30.9 The Pauli Exclusion Principle