Illustrated Glossary of Organic Chemistry
Electronegativity (EN): A
measure of an atom's ability to attract electrons (or electron
density) toward itself. On the Pauling scale, fluorine is the
most
electronegative element (EN = 4.0) and cesium and francium are the
least electronegative elements (EN = 0.7).
Pauling
Electronegativity Values for the Elements
