Electronegativity and Chemical Bonding

This graph illustrates how Pauling electronegativity is related to element group and element period
This graph illustrates how Pauling electronegativity is related to element group and element period.

Physchim62 / Wikipedia Commons

What Is Electronegativity?

Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons.

Ionization Energy

Electronegativity is related to ionization energy. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. Elements with high ionization energies have high electronegativities due to the strong pull exerted on electrons by the nucleus.

Periodic Table Trends

In an element group, the electronegativity decreases as atomic number increases, as a result of increased distance between the valence electron and nucleus (greater atomic radius). An example of an electropositive (i.e., low electronegativity) element is cesium; an example of a highly electronegative element is fluorine.

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Helmenstine, Anne Marie, Ph.D. "Electronegativity and Chemical Bonding." ThoughtCo, Apr. 5, 2023, thoughtco.com/electronegativity-and-periodic-table-trends-608796. Helmenstine, Anne Marie, Ph.D. (2023, April 5). Electronegativity and Chemical Bonding. Retrieved from https://www.thoughtco.com/electronegativity-and-periodic-table-trends-608796 Helmenstine, Anne Marie, Ph.D. "Electronegativity and Chemical Bonding." ThoughtCo. https://www.thoughtco.com/electronegativity-and-periodic-table-trends-608796 (accessed March 19, 2024).