The Manhattan Project was a simple research and development project that led to the creation of atomic bombs during World War II. This was a project led by the United States with help from Canada and the United Kingdom. Scientists (including Albert Einstein) learned of the Nazis' attempts to create atomic bombs. The Nazis were creating atomic bombs to attempt to purify uranium-235 (an isotope of uranium that makes up about 0.72% of natural uranium that is said to be fissile or can sustain a chain reaction). The project was dedicated to finding a way to create a successful atomic bomb. Many scientists had contributed to the Manhattan Project and one scientist who contributed immensely to the Manhattan Project was Arthur C. Wahl. Wahl had become head of the “Nuclear Chemistry Division” shortly after 1943, when J. Robert Oppenheimer and Glenn Seaborg asked him to come to “The Hill.” His main task while working in the Nuclear Chemistry division was to create a way to purify or purify plutonium from B. Hector in Hanford, Washington. To eliminate the result of “spontaneous fission”. Wahl then managed to create such a device that helped purify plutonium, in fact we still use his method today. Another scientist who contributed greatly to the Manhattan Project was a scientist whose name is Niels Bohr. Niels Bohr played an important role in the Manhattan Project when he advocated only the peaceful and harmless use of atomic energy. And during World War II he had written a letter to the United Nations for an “open world” in which he withheld information on how to avoid having distrust or suspicion towards different people. In 1955 he also created the first “…… means of paper…… is also a discovery about leukemia transmitted through radioactive particles that infect people. In connection with the fact that human life was not possible at the bombing sites, plant and animal life was also impossible due to radioactive particles. There are multiple negative effects of the Manhattan Project beyond those mentioned above. Works Cited"51f. The Manhattan Project." The Manhattan Project [ushistory.org]. Np, nd Web. November 27, 2013. "Albert Einstein." - Atomic Heritage Foundation Wiki. Np, nd Web. November 29, 2013. "Arthur C. Wahl." - Atomic Heritage Foundation Wiki. Np, nd Web. November 29, 2013. “Atomic bomb dropped on Hiroshima.” History.com. A&E and Web Television Networks. November 27, 2013. "The Manhattan Project." The Manhattan Project. Np, nd Web. November 29, 2013. “Niels Bohr.” - Atomic Heritage Foundation Wiki. Np, nd Web. November 29. 2013.