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In the simple Bohr model of the ground state of the hydrogen atom, the electron
travels in a circular orbit around a fixed proton. The radius of the orbit is
5.28 × 10-¹1 m, and the speed of the electron is 2.18 × 106 m/s. The mass of an
electron is 9.11 x 10-31 kg. What is the force on the electron?

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