which element is the least electronegativity ? and why ?
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The chemical properties of francium resemble those of caesium. It is the least electronegative of all the elements in the periodic table, meaning that its atoms are very, very unlikely to attract electrons and thus form negative ions. This is due to the distance of its electrons from the nucleus and its atomic number.
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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.
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