which pair of elements can be used to determine the age of a fossil that is over one billion years old?\no…

which pair of elements can be used to determine the age of a fossil that is over one billion years old?\no lead, which is radioactive, and uranium, which is stable\no carbon, which is radioactive, and nitrogen, which is stable\no argon, which is radioactive, and lead, which is stable\no potassium, which is radioactive, and argon, which is stable

which pair of elements can be used to determine the age of a fossil that is over one billion years old?\no lead, which is radioactive, and uranium, which is stable\no carbon, which is radioactive, and nitrogen, which is stable\no argon, which is radioactive, and lead, which is stable\no potassium, which is radioactive, and argon, which is stable

Answer

Brief Explanations:

Potassium - 40 is a radioactive isotope with a long half - life (about 1.25 billion years). It decays into argon - 40. This potassium - argon dating method is useful for dating very old rocks and fossils over one billion years old. Carbon - 14 has a relatively short half - life and is used for dating much younger materials. Uranium is radioactive and lead is a decay product of uranium, but the description in the first option is incorrect as uranium is radioactive. Argon is not typically used as a radioactive parent isotope in common dating methods for such old fossils.

Answer:

potassium, which is radioactive, and argon, which is stable