The Quantum Concept. Waves and Particles. The Schridinger Equation in One Dimension. Further Analysis of One-Dimensional Bound Systems. The Free Particle as a Traveling Wave. Three Dimensions and Angular Momentum. Angular Momentum and Superposition of States. The Radial Schridinger Equation. The Hydrogen Atom. Spin. Identical Particles. Approximate Solutions. Atomic Spectroscopy. Time-Dependent Perturbations and Radiation. Molecular Structure and Spectra. Quantum Statistics. Appendix A: Probability and Statistics. Appendix B: The Boltzmann Factor. Appendix C: Relativistic Dynamics. Appendix D: Derivation of the Eigenfunctions of the L<+>2 Operator. Appendix E: Solution of the Radial Equation for the Hydrogen Atom. Appendix F: Numerical Solution of the Schridinger Equation. Appendix G: Stable Particles. Appendix H: Table of Physical Constants. Index.