The Brainliest Answer!
valence of an element is determined by the number of valence electrons present in the outer most shell of its atom.valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
2 5 2
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plz mark brainlest
plz ,mark brainlest