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 1.06×10−10m in diameter. (a) if the average speed of the electron in this orbit is known to be 2.20×106m/s, calculate the number of revolutions per second it makes about the nucleus. (b) what is the electron's average velocity