In a hydrogen atom the negative electron moves in an orbit around the (much heavier) positive proton, bound by the attractive coulomb force. Assuming that the orbit is circular and has a radius of 0.528 X 10^8 cm, calculate the number of revolutions per second made by the electron; calculate the angular momentum of the system. How large would the
hydrogen atom be if it moved with the same angular momentum but was bound by gravitational attraction
