You uncovered a fossil that you suspect is around 100 millio

You uncovered a fossil that you suspect is around 100 million years old Which of the radioisotope pairs in the table below could you eliminated s an appropriate choice for radioisotope dating the accompanying rock?

Solution

The correct answer is : Uranium -238 and Lead 206 because uranium and lead dating is used to date rock that are in the range of 1 million to 4.5 billion years in age.Also, the combination of this pair has half life more than Uranium -235 and Lead -207.