## What element is used in radiometric dating and why?

Potassium-Argon (K-Ar) dating is the most widely applied technique of radiometric dating. Potassium is a component in many common minerals and can be used to determine the ages of igneous and metamorphic rocks .ParentRubidium-87DaughterStrontium-87Half Life(years)47,000millionDating Range(years)10 - 4,600 million3 more columns

## What element does radiocarbon dating use?

carbon isotopes Radiocarbon dating uses carbon isotopes. Carbon-14 is an unstable isotope of carbon that will eventually decay at a known rate to become carbon-12. Cosmic rays – high-energy particles from beyond the solar system – bombard Earths upper atmosphere continually, in the process creating the unstable carbon-14.

## What element is used in radioactive dating of fossils?

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.