Uranium -235 and uranium -238 are different of uranium?

Uranium 235 - neutrons: 143 - atomic mass: 235,043 929 918 ± 0,000 001 957 - half life: 7,038.108 years - concentration in natural uranium: 0,7204 % - 235U is a fissile isotope Uranium 238 -...

U-235 and U-238 are natural radioactive isotopes.

U-235 has a few less neutrons that U-238. But most significantly different are their nuclear fallout times. It takes U-235 roughly 700 million years to decay, but it takes about 4 billion years for...

U-238 has three neutrons more than U-235.

There are two different techniques that have been developed to separate these isotopes. Bear in mind that they are chemically identical - all the chemical reactions they undergo are the same - and...