Electron's speed at any radius ( related to the energy level)

Description

Electrons in atoms orbit the nucleus. The electrons can only orbit stably, without radiating, in certain orbits (called by Bohr the “stationary orbits”) at a certain discrete set of distances from the nucleus. The electron is held in a circular orbit by electrostatic attraction. The centripetal force is equal to the Coulomb force. The electron’s speed at any radius is depended on the orbit energy level.