Answer :

dating:
this dating is called CARBON 14 DATING...because Carbon 14 is the isotope used to date fossils...
Also Potassium 40 is also used in some cases....

Answer: Carbon-14 isotope is used to date ancient artifacts such as fossils.

Explanation:

To determine the age of ancient artifacts such as fossils, we use radiocarbon dating process.

In this process, a naturally occurring radioisotope of carbon which is Carbon-14 is used. This isotope is generally used because this isotope gets constantly created in the atmosphere with the interaction of cosmic rays with the nitrogen present in atmosphere.

Hence, an isotope of carbon which is Carbon-14 is used to determine the age of ancient artifacts such as fossils.