What Element Has the Lowest Electronegativity Value?

Francium has the lowest electronegativity of any element.
This diagram of a francium atom shows the electron shell. Francium has the lowest electronegativity of any element. Greg Robson,Creative Commonns License

Electronegativity is a measure of an atom's ability to attract electrons to form a chemical bond. High electronegativity reflects a high capacity to bond electrons, while low electronegativity indicates low ability to attract electrons. Electronegativity increases moving from the bottom left-hand corner of the periodic table toward the upper right-hand corner.

The element with the lowest electronegativity value is francium, which has an electronegativity of 0.7.

This value uses the Pauling scale to measure electronegativity. The Allen scale assigns the lowest electronegativity to cesium, with a value of 0.659. Francium has an electronegativity of 0.67 on that scale.

Learn About Electronegativity

Most Electronegative Element
Electronegativity and Chemical Bonding
Electronegativity Periodic Table
Printable Electronegativity Periodic Table

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Helmenstine, Anne Marie, Ph.D. "What Element Has the Lowest Electronegativity Value?" ThoughtCo, Jan. 18, 2018, thoughtco.com/lowest-electronegativity-element-608797. Helmenstine, Anne Marie, Ph.D. (2018, January 18). What Element Has the Lowest Electronegativity Value? Retrieved from https://www.thoughtco.com/lowest-electronegativity-element-608797 Helmenstine, Anne Marie, Ph.D. "What Element Has the Lowest Electronegativity Value?" ThoughtCo. https://www.thoughtco.com/lowest-electronegativity-element-608797 (accessed January 21, 2018).