Pregunta:
A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40, which has a half-life of 1.25 billion years. The rock now contains 3 mg of the isotope. About how old is the rock?
Autor: Incredible SnipeRespuesta:
2.5 billion years
0 / 5 (0 calificaciones)
5 answer(s) in total
Respuesta alternativas:
0.4 billion years
0.3 billion years
1.25 billion years
5.0 billion years
Autor
Incredible Snipe