an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom.
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Origin of valence electron
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for valence-shell
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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