His freshman year, he’ll need Physics 151 / 152, and Chem 121 / 122, plus the labs. If he does get the chem classes, it screw up the rest of his whole 4 years because of interlocking pre-reqs later.
The rest of his classes can be moved around between frosh and soph years with not too much of a problem. He has to have those chem classes, though.