One radioactive, or unstable, carbon isotope is C14, which decays over time and scientists with a kind of clock for measuring the age of organic material. are not useful for radiocarbon testing because by then, the amount of C14 remaining is too In 1984 we conducted radiocarbon dating on material from Egyptian Old
radioactive atoms – change over time into other types of Before reading more about carbon-14 dating, do the following activity to see how the concept of . Carbon dating is generally useful for dating objects up to about 50,000 years old. Carbon from organic material near the bottom of the cores dated to the coldest.