The major difference is the required units in science courses. The B.S. program is the more rigorous program and provides a strong foundation in math and physics as well as more upper division chemistry units. The B.S. program is recommended for students planning a professional career in chemistry or related science. The B.A. program has fewer major course requirements, thus allowing students to take more courses in other disciplines. It is recommended for students having strong interests in other areas or cross-disciplinary goals that are not met within the B.S. program.