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valence electron

noun

, Chemistry.
  1. an electron of an atom, located in the outermost shell valence shell of the atom, that can be transferred to or shared with another atom.


valence electron

  1. An electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms.


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Word History and Origins

Origin of valence electron1

First recorded in 1925–30

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