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The first Atom Bomb dropped on Hiroshima was called "Little Boy". It weighted about 9,700 pounds and used about 141 pounds of Uranium-235 to generate an explosive blast roughly equal to about 15,000 tons (or 30 million pounds) of conventional TNT explosive.

The second Atom Bomb dropped was on Nagasaki. It was called "Fat Man". It weighed about 10,300 pounds and used about 14 pounds of Plutonium-239 & 240 to generate an explosive blast roughly equal to about 21,000 tons (or 42 million pounds) of conventional TNT explosive.

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9y ago

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