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2 Atomic Physics Rutherford's atomic model states that electrons move in circular or elliptical orbits around the nucleus. They are held in orbit by the Coulomb force. In hydrogen, a single electron moves in a circular orbit around a single proton. The radius of a hydrogen atom is 5.3. 10-1 ma) What is the Coulomb force between the proton and the electron? (b) What is the speed of the electron?

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