The first separation of uranium isotopes was in 1942 in USA - electromagnetic separation (the installation was named calutron).
The first nuclear bomb, known as "Little Boy," used uranium-235 as its fissile material. It was an enriched uranium bomb that was detonated over Hiroshima, Japan, in 1945.
The fissile fuel in the first 3 bombs was:Plutonium, Trinity test, July 16, 1945Uranium, Hiroshima attack, August 6, 1945Plutonium, Nagasaki attack, August 9, 1945Trinity test Gadget: Plutonium. First atomic bomb detonation.Hiroshima Little Boy: 80% enriched Uranium. First atomic bomb used in combat.Take your pick.
To use natural uranium in a bomb either of 2 things must be done first, both are expensive and require large infrastructure investment to do them:Enrich the uranium from 0.72% uranium-235 (natural) to 93.5% uranium-235 (Oralloy or HEU).Process the uranium to turn some of the uranium-238 to plutonium-239 in a reactor then chemicallly separate the plutonium from the rest of the irradiated material chemically.In WW2 the US did step 1 at Oak Ridge, TN using a gigantic gaseous diffusion enrichment plant and an electromagnetic separation plant; and step 2 at Hanford, WA using several graphite moderated reactors and large chemical separation plants called "canyons".
When it comes to heavy elements that are used in weapons and in reactors, uranium and plutonium are both candidates. The first atomic bombs were made of uranium, and they are now pretty much made of plutonium. Some special nuclear reactors are powered by plutonium fuel, but most reactors for power generation use (enriched) uranium for fuel. Links are provided to relevant articles posted by our friends at Wikipedia, where knowledge is free.
The United States
The Manhattan Project was the code name for the WWII project to build the first Nuclear Weapon, the Atomic Bomb.
"Manhattan Project"- APEX :)
Manhattan experiment project produced the first atomic bombs in the course of World War II.
The Manhattan Project was the secret project to design and build the world's first atomic bomb.
Los Alamos was the location for part of the Manhattan Project, which was the code name for the creation of the first nuclear bombs. Uranium enrichment was mainly done at Los Alamos.
America was in debt during the Manhattan project. The Manhattan project was led by the United States and produced the first atomic bombs during World War II.
The Manhattan Project resulted in the US creating the first nuclear bomb, which was the cause for Japan to surrender.
The first Nuclear Weapon.
the first atomic bomb.......................................
The Manhattan Project.
To create the first atomic weapons.
C. atomic bomb.