Harkins, William Draper (1873â€“1951), a United States physical chemist. In 1915 he suggested the theory of thermonuclear fusionâ€”that great amounts of energy are liberated by the fusion of four hydrogen atoms to form a helium atom.
Chemists have changed the way that science looks at the world. By breaking substances down to the atomic level, chemists have greatly expanded our knowledge of the world. Click here to find articles about the greatest chemists in history.