Atomic bombs were exploded in war in Hiroshima and Nagasaki at the end of World War II.
The Hiroshima Bomb
Due to its long, thin shape, the Hiroshima bomb was called ‘Little Boy’. The material used was uranium 235. It is believed that the fission of slightly less than one kilogram of uranium 235 released energy equivalent to approximately 15,000 tons of TNT.
The Nagasaki Bomb
Compared to the one used on Hiroshima, the Nagasaki bomb was rounder and fatter. It was called ‘Fat Man’. The material used was plutonium 239. The fission of slightly more than one kilogram of plutonium 239 is thought to have released destructive energy equivalent to about 21,000 tons of TNT.
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