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As we know electrons continuously revolve around the nuclus without falling in it at a high velocity beating it's force of attraction. My question is where do electrons get energy to revolve around the nucleus and withstand its force of attraction.

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    $\begingroup$ I wonder where the Earth gets its energy to withstand the attraction of the Sun... ;) $\endgroup$ – Vibert Feb 23 '13 at 17:54
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    $\begingroup$ Electrons don't revolve around the nucleus... that's still a classical (at best semi-classical) picture. The electrons are described by their quantum mechanical orbitals around an atom. I haven't explained anything, but now you have some more words to google. :) $\endgroup$ – Kitchi Feb 23 '13 at 17:57