Illustrated Glossary of Organic Chemistry

Electropositive: An element with low electronegativity. (EN = 0.7 to 1.5). This EN range is somewhat arbitrary.

Pauling Electronegativity Values for the Elements

Fluorine (shown in red) is the most electronegative (least electropositive) element (EN = 4.0). Cesium and francium (shown in blue) are the least electronegative (most electropositive) elements (EN = 0.7).