What elements can be used for radiometric dating?

Radiometric Age DatingOriginal elementDecay productHalf-life (years)Uranium-238Lead-2064.5 billionUranium-235Lead-207704 millionRubidium-87Strontium-8748.8 billionPotassium-40Argon-401.25 billion2 more rows•3 Oct 2018

What element is used in absolute dating?

One of the most widely used is potassium–argon dating (K–Ar dating). Potassium-40 is a radioactive isotope of potassium that decays into argon-40. The half-life of potassium-40 is 1.3 billion years, far longer than that of carbon-14, allowing much older samples to be dated.