Eli5, what does ‘enriched’ mean in the context of, for example, ‘enriched uranium’?

Question

Eli5, what does ‘enriched’ mean in the context of, for example, ‘enriched uranium’?

In: Physics

Answer 1

Uranium has 2 main isotopes U-235 and U-238 but only the U-235 is useful in nuclear reactions. The process of separating the two isotopes is known as enriching. The part with a higher percentage of U-235 is the “enriched uranium” the leftovers are “depleted uranium”