Nulcear Weapons 1 - Leo Szilard
Radioactive elements were first isolated and studied around 1900. In 1933, Leo Szilard, a Hungarian physicist, was the first to suggest that the chain reaction of radioactive elements could be used to construct a bomb. He left Hungary for Berlin in 1919 and studied at the Institute of Technology under people like Albert Einstein. He got his doctorate in physics in 1923 from Humboldt University of Berlin. He worked as a physicist and inventor in Berlin for the next decade.