Question: A hydrogen atom emits a photon that has momentum with a magnitude of 5.452 x 10-27 kg ? m/s. This photon is emitted because the

A hydrogen atom emits a photon that has momentum with a magnitude of 5.452 x 10-27 kg ? m/s. This photon is emitted because the electron in the atom falls from a higher energy level into the n = 1 level. What is the quantum number of the level from which the electron falls? Use a value of 6.626 x 10-34 J ? s for Planck's constant.

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