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They revolve in their shells.Their are shells named as K(1),L(2),M(3),N(4)......
Each shell has its own energy level.So no electron get out of the shell.When energy is supplied or taken out from an electron it gets transferred to another shell.
If this is not what you want ask in comments..
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Electrons revolve in their shells. Hope I helped u.. Plz mark as the Brainliest answer...
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