SDN Members don't see this ad. (About Ads) Which constants do you guys think (or know) should be memorized for the MCAT? Should I be spending my time trying to memorize R, Avogadro's, the mass & charge of electons, etc...? According to EK many if not most of the constants will be given on the real MCAT, but I'm sure there are some I should memorize anyway. Thanks!