The radioactive isotope for potassium is potassium-40. It has a half-life of 1.25 x 109 years. It decays to release calcium-40 in some cases and argon-40 in other cases. this is the cause behind abundance of argon in the atmosphere. The decay time is calculated based on potassium-argon dating, which measures both potassium-40 and argon-40 levels. On the other side, radiocarbon dating measures only carbon-14 levels. Measurement of product argon-40 levels sensitizes the technique for longer decay times.
Get Answers For Free
Most questions answered within 1 hours.