quantum physicists are scientists who study the inner workings of atoms. to do this, quantum physicists often rely on models. why do quantum physicists typically use models to study atomic particles instead of observing atomic particles directly? a. atomic particles move too slowly for physicists to be able to study them directly. b. atomic particles no longer exist, so physicists can no longer observe them directly. c. atomic particles are too small to be easily observed directly. d. atomic particles can be very dangerous to observe directly.