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In spite of its long history, an accurate scale of electronegativity was not developed until 1932, when Linus Pauling proposed an electronegativity scale which depends on bond energies, as a development of valence bond theory. It has been shown to correlate with a number of other chemical properties.
The modern definition of electronegativity is due to Linus Pauling. It is: The power of an atom in a molecule to attract electrons to itself. (p. 88) Although electronegativity, as a concept dates back to 1809, no one had been able to quantify it until Pauling in 1932. He based his work on differences in bond energies.
Apr 7, 2021 · Then, in 1916, Gilbert Newton Lewis formulated his theory of chemical bonding, according to which chemical bond is a result of sharing valence electrons. 3 Development of this theory has led...
Electronegativity < 37 > Pauling's electronegativity scale was a number of steps removed from any rigorous grounding in quantum mechanics, was therefore one of his least theoretically well-founded ideas — and became one of his most influential.
electrons. pauling called this factor elec-tronegativity—the tendency of an atom to attract electrons in a bond. pauling assigned electronegativity values to elements based on their attraction for electrons in a bond. fluorine, with one of the strongest tendencies to attract electrons, was assigned an electronegativity value of 4;
Figure 6.2.2 shows the electronegativity values of the elements as proposed by one of the most famous chemists of the twentieth century: Linus Pauling ( Figure 6.2.3 ). In general, electronegativity increases from left to right across a period in the periodic table and decreases down a group.
His contributions to the theory of the chemical bond include the concept of orbital hybridisation and the first accurate scale of electronegativities of the elements. Pauling also worked on the structures of biological molecules, and showed the importance of the alpha helix and beta sheet in protein secondary structure.
