Basic Principles of chemistry. Microscopic nature of atoms and molecules; macroscopic properties of chemical systems. Topics inlcude stoichiometry, atomic and nuclear structure, chemical bonding, molecular structure, gases, and intermolecular forces. More extensive lecture treatment of advanced topics and laboratory work than CHEM111. Prerequisite: Secondary school chemistry and a grade of 23 or greater on Part A and 5 or greater on Part B of the math placement exam. Corequisite: MATH127 or 131