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Detemine the velocity of an electron in Bohr's H atom for a quantum state n.

(HINT: you will leave your velocity in terms of n. Start with the kinetic energy (1/2mv^2) = Total energy

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An electron in an excited energy state of the Hydrogen atom has an energy En = 0.85 eV which is 12.75 eV above the ground state. What is the radius rn of the electron’s orbit? Select one: a. 4.77 angstroms b. 13.23 angstroms c. 8.47 angstroms d. 2.12 angstroms