4. A scientist finds a rock with old microfossils in it, likely from around 4 billion years ago. Which
radioactive isotope should the scientist use to determine the age of the sample and why? (
se fosse uma pedra com 4 bilhoes de anos qual isotopo deveria de usar e porque?)

Respuesta :

Answer:

U-238

Explanation:

the half-life of uranium-238 is about 4.5 billion years