Basic principles of chemistry, including stoichiometry. Introduction to solution phase chemistry. Gas phase chemistry. Thermodynamics, including enthalpies of formation and reaction. Atomic structure, periodic trends, chemical bonding, molecular structure. Students who successfully completed 171 or 181A with a grade of C or better will not be allowed to enroll in 161 without instructor override. Students who successfully complete 161 with a grade of C or better will not be allowed to enroll in 171 or 181A without instructor override. Pre: C (not C-) in 131 or C (not C-) in 151 or successful completion of placement exam, or consent.