Uranium is an element; it cannot be 'made' as it were. It is similar to iron or oxygen in that respect.
Only supernova explosions are powerful enough to actually make uranium or any element heavier than nickel and iron. Some uranium can be made in nuclear breeder reactors or in labs by bombarding thorium samples with neutrons.
Uranium
Uranium
all isotopes of uranium have 92 protons, that is what makes them uranium.
More than 99%of naturally occurring uranium is U-238. The valuable U-235 makes up less than 1% of uranium, and must be "enriched" in complicated processes.
Uranium 235
We're what makes the world churn.
Kazakhstan (in 2010).
There are 3 major isotopes of uranium: Uranium-238, 235, and 234. These numbers are the amount of neutrons in the nucleus. Since Uranium only has 92 protons, this makes these isotopes VERY neutron-heavy!Uranium-238 is the most common in nature, followed by 235, then 234. All these are radioactive isotopes. Because there are so many neutrons in Uranium, it makes it fissile -- easy to split.
Kazakhstan, Australia, Canada
Uranium is used as nuclear fuel or explosive in atomic bombs.Uranium has also many minor applications.
Uranium is not lighter but heavier than many of the other elements; the density of uranium is 19,05 g/cm3 and the atomic weight is 238,02891.
The concentration of uranium in granites is 10-20 mg/kg.