Question

Mass of an electron is 9.0 × 10-31 kg. It revolves around the nucleus of an atom in a circular orbit of radius 4.8 Å with a speed of 6 × 10 6 m/s. Calculate the linear kinetic energy and the angular momentum of the electron.

Answer 1

well, the value of velocity isn't the way it should be, so the concept to solve problem is here : electrostatic force will provide necessary centripetal force required to revolve around nucleus : kqQ/r^2=mv^2/r