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The first nuclear bomb was tested on July 15, 1945. Bombs were detonated over Hiroshima and Nagasaki on August 6 & August 9, 1945.
Early experiments in the 1930's showed nuclear fission was possible, but the "bomb" development wasn't started until the beginning of World War II.
The Americans, Germans, and even the Japanese were working on separate Atomic Bomb projects during World War II. The Americans were the only ones to actually complete a working and deliverable bomb during the war.
I've read that there were a huge group of people working on the bomb development in the USA. Perhaps headed by J. Robert Oppenheimer. Many of the people, especially lower level employees would have been on a "need to know" basis, and so many people probably had no idea what they were working with, or how dangerous the materials that they were working with actually were.
There is more information on the Wikipedia page on the Manhattan Project.
http://en.wikipedia.org/wiki/Manhattan_Project
What else can I help you with?
What year was the nuclear bomb developed?
1945
What year did the nuclear bomb explode in hiroshima?
1945
In What year was the first nuclear bomb invented?
The first atomic bomb, developed by the Manhattan Project during World War II, was set off on July 16, 1945, in the New Mexico desert.
When was the first nuclear bomb invented?
The atomic bomb was invented in 1933 by Leo Szilard while crossing a street in London and patented the following year. For many reasons he was not able to build it at the time by himself.It took 12 years before the US was able to build the first atomic bombs and use them to end WW2.
What year did the us spend most on nuclear bomb production in the cold war?
Yes
What year was the nuclear bomb developed?
1945
In what year was the first nuclear bomb made?
1945
What year did the nuclear bomb explode in hiroshima?
1945
In What year was the first nuclear bomb invented?
The first atomic bomb, developed by the Manhattan Project during World War II, was set off on July 16, 1945, in the New Mexico desert.
In what year did they make the nuclear bomb?
1946 off by one year, 1945
What year was the first nuclear bomb droped in a war?
1945
What year did James Rutherford invented atomic bomb?
Never! Leo Szilard invented the atomic bomb in 1933.
What year was atomic bomb invented?
"Invention" does not typically require the physical realization of the invented thing, nor a working model according to patent law. A patent for an atomic bomb was awarded to Leo Szilard in 1934. That patent is regarded as the invention of the atomic bomb. He immediately tried to turn the patent over to the British government as a gift. He was attempting to restrict the availability of the bomb. On October 8, 1935 the British War Office rejected the offer. Later, in February 1936 the British Admiralty accepted the gift.
Who invented belt loops?
Levi Strauss invented belt loops. He made this invention in the year of 1933. It was considered to be a turn of the century invention.
What year was the nuclear weapon invented?
1945
When was the invention The Stripper' invented?
it was some year ago hehehe
In 1945 what happened with nuclear weapons?
1945 was the first year that a Nuclear bomb was successfully tested then used in combat.
