# What are two isotopes of uranium? Which can be used to make energy?

Jan 24, 2017

Uranium^235 & Uranium^238

#### Explanation:

Only $U r a n i u {m}^{235}$ can be used to produce energy, but $U r a n i u {m}^{238}$ is the most abundant variant (99%) of Uranium. Hence uranite (uranium bearing mineral) needs to go through a centrifugal filteration process (Uranium Centrifuge Process) to isolate the $U r a n i u {m}^{235}$. $U r a n i u {m}^{238}$ has a small probability for spontaneous fission or even induced fission with fast neutrons.

There is a third isotope of Uranium called $U r a n i u {m}^{233}$ which can be produced from natural thorium can also be used by nuclear reactors to generate energy.