Electronegativity (Pauling scale)
Notes Separate values for each source are only given where one or more sources differ. Electronegativity is not a uniquely defined property and may depend on the definition. The suggested values are all taken from WebElements as a consistent set. Many of the highly radioactive elements have values that must be predictions or extrapolations, but are unfortunately not marked as such. This is especially problematic for francium, which by relativistic calculations can be shown to be less electronegative than caesium, but for which the only value (0.7) in the literature predates these calculations.
Electronegativity (Allen scale) Allen electronegativity is related to the average energy of the valence electrons in a free atom. Tabulations of values have been published.
Electronegativity (ReVEBE scale) The values were published in 2026.
References