No one person made any nuclear bomb. Different components were/are made by different people, then a team of a dozen or more do final assembly.
US
1945
it was first noticed with the nuclear bomb tests.
No one. The first nuclear device was not tested until July of 1945, and the first bomb was not produced (not used) until later that month.
The first was made in the US. The purpose was originally to defend against the possibility of a Nazi bomb. 1945.
Germany has not made a nuclear bomb.
Atom bomb dropped in Japan by the U.S. during WWII
I think it was Arizona Actually the nuclear bomb called the Manhattan Project was made and tested in New Mexico.
Long before the first one was made. That was the purpose of making them: to have a very dangerous bomb (all bombs are dangerous).
United States.
The atomic bomb was the first nuclear weapon ever made during World war two and it was the first weapon that have been tested before Hiroshima was under attack.
The first Nuclear weapon was created by a team of American Scientist's, known as the Manhattan project. It was first tested and used in 1945, not long before we used them on Japan.