Gilbert Newton Lewis was an American chemist who lived from October 25, 1875 to March 23, 1946, born in Weymouth, Massachusetts to Frank Wesley Lewis and Mary Burr White Lewis. Lewis was an intelligent child, who received an early education at home and learned to read by the age of three. When Lewis was nine, his family moved to Lincoln, Nebraska. To be enrolled in the preparatory school. Where he later attended the University of Nebraska for two years and transferred to Harvard University to receive his Bachelor Degree in 1896. Later on, Lewis worked on electrochemical potentials with T. W. Richards and obtained his Ph.D in 1899 from Harvard University. Lewis then went to Germany to worked with physical chemists Walther Nernst and Wilhelm Ostwald in Leipzig and in Göttingen. Afterwards, Lewis returned from Germany to Harvard as an instructor from 1901 to 1906. During his time in Harvard, Lewis was granted leave in 1904 to become the Superintendent of Weights and Measures for the Bureau of Science in Manila, Philippines. In his return in 1907, Lewis became an assistant professor at the Massachusetts Institute of Technology, where he soon became the rank of professor. In 1912, he left MIT to accept a position as dean and chairman of the college of Chemistry at the University of California Berkeley and stayed there for the rest of his life.Some of Lewis accomplishments are valence theory which he proposed that a polar bond was formed by the transfer of electrons and a nonpolar bond does not involving electron transfer. Lewis published his groundbreaking article suggesting that the chemical bond is a pair of electrons shared or held jointly by two atoms. He showed this by a single bond by two cubes sharing an edge or by double dots in what has become known as Lewis dot structure which we still use today. Also, in the theory of relativity which derived the mass-energy relationship in a different way from Albert Einstein’s derivation. In 1912, he worked with Edwin Bidwell Wilson to find groundbreaking mathematical physics that not only applied synthetic geometry to the study of spacetime, but also the identity of a spacetimes. He was also the first to coin the word “photon” which is the unit of light. Next, Lewis was the first to produce heavy water which is a pure sample of deuterium oxide. Heavy water helped study survival and growth of life forms in a new substance. Furthermore, Lewis was able to study many of the properties of atomic nuclei. In addition, Lewis discovered electron-pair concept of acids and bases. Where acids were classified more generally as electron-pair acceptors and bases as electron-pair donors. This theory was useful in explaining many reactions that were left unanswered. Lewis made additional accomplishments by contributions to the theory of colored substances, radiation, the separation of isotopes, photochemistry, phosphorescence, and fluorescence. Next during World War I working for the U.S. Army Chemical Warfare Service, he worked on defensive systems against poison gases used on the front lines. Lewis died, while measuring the dielectric constant of hydrogen cyanide on March 23, 1946 in an University of California Berkeley lab. The death was caused by a leak in the pipe and some say it was suicide since Lewis was moody that day and some of his students had received nobel peace prizes while he did not.