Quantum theory and spectroscopy. The origins of Quantum mechanics and the need for quantization. The development of Schrodinger wave equation and its properties. The application of Schrodinger equation to the particle in a box. The structure and spectra of hydrogenic atoms. Molecular structure and the Huckel approximation. Molecular spectroscopy and the rotational vibrational spectra. Statistical thermodynamics and applications. Reaction dynamics and surface catalysis.