1985				Discovery of fullerenes
1962				Bartlett synthesizes xenon hexafluoroplatinate
1940				McMillan & Philip H. Abelson identify neptunium
1938				Otto Hahn discovers process of nuclear fission
1932				James Chadwick discovers the neutron
1931				Harold Urey discovers deuterium
1921				Stern & Gerlach establish quantum mechanical spin
1912				X-ray crystallography is established
1912				Peter Debye develops concept of molecular dipole
1909				S. P. L. Sørensen invents the pH concept