archaeologists use radioactive decay of an isotope of the element because it has a fairly short half - life…

archaeologists use radioactive decay of an isotope of the element because it has a fairly short half - life and is found in anything that was once living. cobalt uranium carbon technetium
Answer
Brief Explanations:
Archaeologists use carbon - 14 dating. Carbon - 14 is an isotope of carbon, has a relatively short half - life and is present in once - living organisms.
Answer:
carbon