Is taking AP Chem and AP Physics C EM at the same time manageable,?
Depending on your schedule this is entirely manageable. There are a few cases in which I would consider doing this: The four other classes are relatively easy. Maybe they are AP Macro, APES, AP European History, Ap Language or Literature, or really any other humanities AP course in a subject which you feel comfortable in. In my experience these courses had extremely low time demands (