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When an electron revolves around the nucleus of an atom is it using any energy in doing so. If so, where does this energy come from and how does it be a constant source (the electron revolves forever)? What is the energy being used and how is it not getting over?

Qmechanic
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InfiniteParadox
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    This is the question that led to quantum mechanics. The short answer is "no it uses no energy to remain in its orbit". – Floris Jan 07 '15 at 13:59
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    @Floris Oh sorry for that. So how does it manage to keep revolving if it doesn't use up any energy? My apologies if this irritated you. – InfiniteParadox Jan 07 '15 at 14:00
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    Not irritated at all. It is a very deep question. The answer is that you cannot explain this without moving away from the concept of a particle "orbiting" - the classical electron must radiate and lose energy but that is not what happens. This led to a fundamental rethinking of physics. – Floris Jan 07 '15 at 14:07
  • Be aware that, for example, the ground state for hydrogen has zero angular momentum. Indeed, on the Bohmian interpretation, an S state electron is stationary. http://www.bohmian-mechanics.net/whatisbm_pictures_hydrogen.html – Alfred Centauri Jan 07 '15 at 14:18
  • @AlfredCentauri: stationary or just moving in a straight line through the nucleus? – SuperCiocia Jan 07 '15 at 15:32
  • @SuperCiocia: stationary. – John Rennie Jan 07 '15 at 15:37

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