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the gadget was tested at trinity site,new Mexico near Alamogordo
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the first atomic bomb dropped over the Japanese city of Hiroshima.
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The first,Little Boy, was a gun type weapon with a uranium core.
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The second weapon, dropped on Nagasaki, was call fat Man and was an implosion type device with a plutonium core.
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An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons,and electron.