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When did Gilbert N. Lewis publish his electron-pair model of the covalent bond?
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Gilbert N. Lewis published his model of the covalent bondâwhich defined the bond as the sharing of a pair of electrons between two atomsâin 1916.1
In this same paper, he introduced the Lewis structures (often called electron dot diagrams) used to represent the electronic structures of atoms and molecules. While he later summarized his work in a 1923 monograph, the foundational model was established with his 1916 publication.1