Difference Between Electronegativity And Electron Affinity

People come across two terms viz electronegativity and electron affinity while dealing with bonds and atoms. Electronegativity is defined as a chemical property which decides the propensity of an atom to attract an electron. In the year 1932, Linus Pauling proposed the concept of electronegativity. Electron affinity is defined as the amount of energy liberated when a molecule or neutral atom acquires an electron from outside. This property is a fixed and measurable value. Below are the key differences between electron affinity and electronegativity.

Difference Between Electronegativity And Electron Affinity

Comparison basis Electronegativity Electron Affinity
Define The ability of atoms to attract electrons from outside The amount of energy liberated when a molecule or neutral atom acquires an electron from outside
Applied to Single-atom Either an atom or molecule
Measured Pauling units Kj/mol or eV
Property Qualitative Quantitative
Example Fluorine Chlorine

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