Uranium is not made of any material because Uranium is an element and elements are not made of something else.
Uranium oxide is a compound made up of uranium and oxygen, and is not considered a metal. Uranium itself is a metal, but when combined with oxygen to form uranium oxide, it becomes a ceramic material.
Uranium 235, or plutonium, depending on weapon design
Uranium is a not a so rare material !
Basically, nuclear weapons are made from uranium or plutonium material and hydrogen as a chain reaction nucleus.
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.
Uranium is a very useful material but uranium is also toxic an radioactive.
The comparison is not possible. Cobalt 60 is a gamma ray emitter, uranium 235 is a fissile material.
According to the United States Nuclear Regulatory Commission, nuclear fuel is from three different kinds of fuel. The special one consists of uranium-233, uranium-235, enriched uranium, or plutonium. The Source is from natural uranium or thorium. It can also come from depleted uranium not suitable as a reactor fuel. The byproduct can come from radioactive material. They also contain waste and tailings made by extracting or concentrating the uranium or thorium from an ore processed mainly for its content of source material.
Uranium is a very expensive and desired material; having uranium is equivalent with to be rich.
Uranium-238 is a fertile nuclear material that is useful in producing fissile material (Plutonium 239)
In uranium plants
Uranium is the starting material in nuclear reactors, which then produce electricity.