Respuesta :
Answer:
The isotope you would use to date a fossil from paleozioc era is the 47 billion years half-life 87rb as the paleozoic era dates from 540 to 248 million years ago.
Explanation:
Sometimes geologists need to estimate older fossils, like the ones from the paleozoic era which is the oldest of the three eras.
Carbon-14, the radioactive isotope of carbon used in carbon dating has a half-life of 5730 years, so it decays too fast and it is useful to date fossils younger than about 75,000 years.
To date most older fossils and to estimate how long ago rocks formed, geologists use unstable radioactive isotopes of elements, decaying at constant, and this is called radiometric dating, rocksadiometric dating or radioisotope-dating of igneous rocks or ash located above, below or around the fossil vecinity.
Fossils are the remains and impressions of dead organisms like plants and animals that lived a long time ago in the geographical timeline.
The isotope used to date a fossil from the Paleozoic era will be 47 billion years half-life Rb- 87.
The geographical timeline 541 million years ago after the Cambrian explosion was known as the Paleozoic era. The oldest era is the Paleozoic era and to date, the fossils from that era isotope of Rubidium (Rb) should be used.
The isotope of carbon C-14 has a half-life of 5730 years only that will decay too faster while the isotope of rubidium has a half-life of 47 billion years that will make it best to date fossils from 500 million years ago.
To date fossils from a different era, geologists use radioactive isotopes and this is known as radioisotope dating of rock and radiometric dating.
Therefore, the isotope Rubidium-87 will be used.
To learn more about radio dating of fossils follow the link:
https://brainly.com/question/4126587
