A hydrogen atom emits a photon that has momentum 0.6592 × 10-27 kg·m/s. This photon is emitted because the electron in the atom falls from a higher energy level into the n = 3 level. What is the quantum number of the level from which the electron falls? Use values of h = 6.626 x 10-34 J·s, c = 2.998 x 108 m/s, and e = 1.602 x 10-19 C.