Which of the following radioisotopes could be used to accurately date a fossil that is thought to be over 750 million years old? A)²³⁸U B)¹⁴C C)²³⁵U D)²³⁵U or ²³⁸U E)¹⁴C or ²³⁵U

Question

Quizplus · Accepted Answer

The radioisotopes that could be used to date a fossil that is thought to be over 750 million years old are ones with long half-lives, meaning they decay very slowly over time. The best choices from the options given are ²³⁵U and ²³⁸U as they both have long half-lives of 4.47 billion years and 704 million years, respectively, which makes them ideal for dating fossils that are over 750 million years old.

Which of the Following Radioisotopes Could Be Used to Accurately