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<p>the number of <a href="page.php?w=Electron">electrons</a> that must be lost or gained by an <a href="page.php?w=atom">atom</a> to obtain a <a href="page.php?w=Octet_rule">stable electron configuration</a>. In simple terms, it is the measure of the combining capacity of an element to form <a href="page.php?w=chemical_compound">chemical compound</a>s. Electrons found in the outermost <a href="page.php?w=Electron_shell">shell</a> are generally known as <a href="page.php?w=Valence_electron">valence electrons</a>; the number of valence electrons determines</p><p>
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