Question

Uranium-238 that crystallized at the same tim Earth formed has undergone approximately how many half-lives of radioactive decay?

Answer 1

Number of Half-Lives = (4.543E9/4.468E9) = 1.0168 half-lives

Explanation:

`t_(1/2) [U-238]` = `4.468E+9."billion"."years^((1))`
`"Age"` of `"Earth"`= #4.543E+9. billion years^(2)"
(1) https://en.wikipedia.org/wiki/Uranium-238
(2) https://en.wikipedia.org/wiki/Age_of_the_Earth

Number of Half-Lives = (4.543E9/4.468E9) = 1.0168 half-lives