Otto Hahn

Otto Hahn (born 8th March In 1879 in Frankfurt am Main; died 28th July In 1968 in Goettingen) was a German chemist and a pioneer of the radiochemistry. During the 1905-1921 years he discovered numerous isotopes (today Nuklide called), in 1909 the radioactive recoil, in 1917 the element protactinium and in 1921 the Kernisomerie with the " uranium Z “. For the discovery of the nuclear fission of the uranium (in the end of 1938) and the thorium (in the beginning of 1939) the Nobel prize was lent him in 1945 for chemistry of 1944. Otto Hahn counts as a " father of the nuclear chemistry “ and counts to the most significant scientists of the 20-th century.