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Which elements have the lowest electronegativity values?
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chemical element
The geochemical cycle.
The elements with the lowest electronegativity values are the alkali metals, which are located at the far left of the periodic table.12
Specifically, cesium and francium are recognized as the least electronegativeāand therefore the most electropositiveāelements. On the Pauling scale, which measures the ability of an atom to attract shared electrons in a chemical bond, cesium has a value of 0.79, while francium is cited as having a value of 0.7.321
Because these elements have a single, weakly bound valence electron, they exhibit a very low tendency to attract additional electrons, instead favoring the formation of positive ions (cations) during chemical reactions.1