Valence Electrons and Isotopes: What is Valence Electrons? The valency, i.e., the combining capacity, of an atom of an element depends on the number of electrons present in its outermost orbit or shell (highest energy level). These electrons are, therefore, often referred to as valence electrons (or valency electrons). The chemical properties of an element depend on the number of valence electrons present in its atom and are more or less independent of the nuclear mass. What is Isotopes? It has been found that all the atoms of an element do not have the same masses but they have the … Continue reading Valence Electrons and Isotopes