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15. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06xl diameter. (a) If the average speed of the electron in this orbit is known to be 2.20x10° m/s, calculate the number of revolutions per second it makes about the nucleus. (b) What is the electrons average velocity? 0-10 m in
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