Early Primate Evolution: Isotopes Commonly used for Radiometric Dating. uranium-238 and potassium-40.

## What radioactive isotopes are used in radiometric dating?

Uraniumâ€“lead radiometric dating involves using uranium-235 or uranium-238 to date a substances absolute age. This scheme has been refined to the point that the error margin in dates of rocks can be as low as less than two million years in two-and-a-half billion years.

## Which elements are commonly used in radiometric dating?

Potassium-Argon Dating 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.