Molecular Physics and Quantum Chemistry systematically and accessibly introduces the fundamentals of both fields necessary for understanding the physical properties of molecules and chemical bonding. Building on basic knowledge from atomic and quantum physics, it provides students of physics, physical chemistry, and theoretical chemistry with the experimental and theoretical foundations as well as their interactions. This fifth edition has been expanded to include significant recent developments in experimental methods and theoretical approaches. New sections cover molecular functional units, optical spectroscopy, and electroluminescence. The thoroughly revised new edition contains 133 problems, with solutions available online.