Question

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what is electron?
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Answer 1

Answer:

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. The larger the spherical shell, the higher the energy contained in the electron.

The word electron was coined in 1894 and is derived from the term “electric,” whose ultimate origin is the Greek word 'ηλεκτρον, meaning amber.