# Is electronegativity quantifiable on an absolute scale?

$\text{Electronegativity}$ is conceived to be the ability of an atom involved in a chemical bond to polarize electron density towards itself. There are various scales, of which the $\text{Pauling scale}$ was one of the earliest, and is still most widely used.
Pauling originally used ionization enthalpies, and electron affinities, measurable atomic properties, which he then normalized to give a useful scale that gave a dimensionless quantity, $\chi$, that varied between $0$ and $4$.