Which energy OR force is responsible for revolving of electron?

Asked by narendra | 22nd Jul, 2014, 08:27: PM

Expert Answer:

The necessary centripetal force required for the electron to revolve around the nucleus is provided by the electrostatic force of attraction between the nucleus and the electron. If the electrons in an atom were stationary the electrons will be pulled into the nucleus due to the coulomb's attractive force.The structure of the atom can be stable only if the electrons are revolving around the nucleus.
 
Electrons revolve around nucleus only in certain discrete non radiating stationary orbits.The orbits in which they revolve are those in which the total angular momentum of the revolving electron is an integral multiple of h/2π where h is the Planck,s constant.i.e the anguar momentum of these orbiting electrons are quantised. When the electron revolves in these permitted orbits it does not radiate energy .Since the electrons revolve in a stationary orbit without radiating energy it does not fall into the nucleus. The total energy of electrons in a stationary orbit is negative, which indicates that the electrons are bound to the nucleus and is not free to leave it.

Answered by Jyothi Nair | 23rd Jul, 2014, 09:07: AM

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