define valance electon plzz it is urgent
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In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
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Valence electrons, are the electrons in the outermost shell of the atom that determine an atom's or group's ability to bond with others.
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