A hydrogen bomb was not dropped on Japan. It was dropped years later as a test and to determine how it acted in comparison to the plutonium and uranium bombs.
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No, hydrogen bombs were not dropped on Hiroshima. The atomic bomb "Little Boy" was dropped on Hiroshima by the United States on August 6, 1945, during World War II. Hydrogen bombs are a more powerful type of nuclear weapon that was developed later.
Tsar Bomba was a hydrogen bomb which was actually detonated and not dropped. The test was held on October 30,1961. Tsar Bomba was the most powerful nuclear weapon ever detonated.
The first successful hydrogen bomb was detonated (not launched or dropped--it was a 62-ton fixed structure) on November 1, 1952.
The hydrogen bomb was not invented until the 1950's. The planes that dropped the first fission-type atomic bombs in World War II are the Enola Gay and Bockscar.
No hydrogen bombs were dropped on Vietnam. No nuclear weapons of any kind were used in Vietnam.
Those hydrogen bombs were 20 times stronger at the beginning and later all got worst in the arms race.
Japan was negotiatin with the Soviet Union as the first atomic bomb was dropped.
Only two atomic bombs were used against man kind in war and neither of those were a thermonuclear or hydrogen bomb.
A hydrogen bomb was tested in the 1950s but there have never been any dropped in aggression. In fact no nuclear bombs have been used in action since the atomic bombs were dropped on the Japanese in World War 2.
90,000-166,000 people in Hiroshima and 60,000-80,000 in Nagasaki.