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


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.

Related formulas


vElectron's speed (m/s)
nThe number of energy level (dimensionless)
hPlanck constant
meelectron mass
rOrbit radius at any level (m)