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Many atomic bombs were detonated for "test" purposes. Fortunately none were used in war.
The bombs used on Nagasaki and Hiroshima were both fission bombs, not fusion bombs.
Two one at Hiroshima and other at Nagasaki
The Tokyo bombing with fire bombs did not move the Japanese to surrender so the atomic bombs were used. Hiroshima was the first target city.
The US manufactured them.
They were dropped with airplanes/bombers.
Atomic bombs have only been used in combat twice. The US dropped two bombs, one on Nagasaki, one on Hiroshima.
The new bombs are many, many times more powerful. The Hiroshima bomb was only .02 kilotons. Twenty megatons today is common. so, hundreds of times more powerful.
Hiroshima did not drop bombs. It was the United States who dropped an atomic bomb over Hiroshima on august 6 1945.
90,000-166,000
They have learned better.
it was used on Hiroshima and Nagasaki which are both in Japan.