Gilbert Lewis

Gilbert Lewis is best known for developing the theory of the covalent bond based on shared electron pairs, introduced in his 1916 paper and popularized through what chemists now call Lewis dot structures. This notation, which represents valence electrons as dots around atomic symbols, is still taught in introductory chemistry courses worldwide.

Despite being nominated for the Nobel Prize in Chemistry numerous times over his career, Lewis never received the award. Many historians of science consider this one of the most notable omissions in Nobel history, given that his ideas about chemical bonding and acids and bases are fundamental to modern chemistry.

Lewis defined acids as electron-pair acceptors and bases as electron-pair donors, a broader framework than the earlier Brønsted-Lowry definition that was limited to proton transfer. This more general definition, published in 1923, applies to a wider range of chemical reactions and is particularly important in coordination chemistry and catalysis.

Lewis spent most of his career at the University of California, Berkeley, where he served as dean of the College of Chemistry from 1912 to 1941. Under his leadership, Berkeley's chemistry department became one of the strongest in the world, and his mentorship produced multiple future Nobel laureates, including Glenn Seaborg and Harold Urey.