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a) Using the Bohr model, calculate the speed of the electron in a hydrogen atom in the n=1,2, and 3 levels.
b) Calculate the orbital period in each of these levels.
c) The average lifetime of the first excited level of a hydrogen atom is 1.0x10^-8 s. In the Bohr model, how many orbits does an electron in the n=2 level complete before returning to ground level?
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