WHAT IS ELECTRON? ......... FREE POINT......
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An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels.
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The electron is a subatomic particle whose electric charge is negative one elementary charge.
It was Discovered By J. J. Thomson at (1897)
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