12: Atomic Theory and Quantum Mechanics Last updated Jun 23, 2019 Save as PDF 9.8: New Energy Sources 12.1: Electromagnetic Radiation Page ID15083 ( \newcommand{\kernel}{\mathrm{null}\,}\) Chemical Principles (Zumdahl and Decoste) Textmap Alternative Topic hierarchy12.1: Electromagnetic Radiation12.2: The Nature of Matter12.3: The Atomic Spectrum of Hydrogen12.4: The Bohr Model12.5: The Quantum Mechanical Model of the Atom12.6: Particle in a Box12.7: The Wave Equation for the Hydrogen Atom12.8: The Meaning of the Wavefunction12.9: Orbital Shapes and Energies12.10: Electron Spin and the Pauli Principle12.11: Polyelectronic Atoms12.12: The History of the Periodic Table12.13: The Aufbau Principles and the Periodic Table12.14: The Polyelectronic Model12.15: Periodic Trends in Atomic Properties12.16: The Properties of a Group: The Alkali Metals