Uranium-238 is the most stable isotope of uranium, with a half-life of about 4.468×109 years, roughly the age of the Earth. Uranium-235 has a half-life of about 7.13×108 years, and uranium-234 has a half-life of about 2.48×105 years. For natural uranium, about 49% of its alpha rays are emitted by each of 238U atom, and also 49% by 234U (since the latter is formed from the former) and about 2.0% of them by the 235U. When the Earth was young, probably about one-fifth of its uranium was uranium-235, but the percentage of 234U was probably much lower than this.
Uranium-238 is the most stable isotope of uranium , with a half - life of about 4.468×109 years , roughly the age of the Earth . Uranium-235 has a half - life of about 7.13×108 years , and uranium-234 has a half - life of about 2.48×105 years . For natural uranium , about 49 % of its alpha rays are emitted by each of 238U atom , and also 49 % by 234U ( since the latter is formed from the former ) and about 2.0 % of them by the 235U. When the Earth was young , probably about one - fifth of its uranium was uranium-235 , but the percentage of 234U was probably much lower than this .
What isotope of uranium has the most stability?
What isotope of uranium has the most stability ?
Uranium-238
Uranium-238