CHEMISTS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Hahn, Otto (1878–1968) German chemist awarded the 1944 Nobel Prize for Chemistry for his work on nuclear fission. With Lise Meitner he discovered the new element protactinium; later they bombarded uranium with neutrons, treating the uranium with ordinary barium. Meitner showed that the residue was radioactive barium formed the splitting (fission) of the uranium nucleus. Related category    • CHEMISTS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP