This is the first course in a three-quarter long physical chemistry sequence. This course focuses on quantum mechanics: a theoretical description of matter at the microscopic level. The energy levels of atoms and molecules will be derived; spectroscopic applications will be explored. Students must co-register for the laboratory companion course, CHE 303. (3 quarter hours). Enrollment Requirements: CHE 204 and CHE 205 and (MAT 149 or MAT 152 or MAT 162 or MAT 172) and PHY 172 are prerequisites for this class.