Read Richard Rhodes book "The Making of the Atomic Bomb", the definitive publicly available work on the subject.
No president invented any nuclear bomb.
After USSR (mostly in asia), China.
He invented the first nuclear weapon, the atomic bomb.
This was part of the WW2 Manhattan Project to develop the A-bomb. The first nuclear reactor was demonstrated in Chicago in 1942
Leo Szilard invented the fission bomb. Edward Teller invented the fusion bomb. Both were from Hungary.
During world war 2, the United States finished making them. They were first to have a nuclear bomb and the only ones to use it againts mankind.
he invented it with metal
Leo Szilard invented the atomic bomb in 1933, but could not build it by himself.The US built the first atomic bombs in 1945 and dropped 2 on Japan by airplane.No nuclear missiles have ever been launched in war.
The first atomic bomb was developed during a top secret project in Word War II called "Manhattan".
The first bomb was invented in 1281 A.D.
Atomic bombs were dropped on Hiroshima and Nagasaki in Japan to end WWII.
1933 by Leo Szilard. It took 12 more years to finally build the first ones.