C4 carbon 14 carbon dating
Plants and animals assimilate carbon 14 from carbon dioxide throughout their lifetimes.When they die, they stop exchanging carbon with the biosphere and their carbon 14 content then starts to decrease at a rate determined by the law of radioactive decay.
It is rapidly oxidized in air to form carbon dioxide and enters the global carbon cycle.
In the case of isotopes, the number of neutrons is variable.
If an isotope is stable, then unless some outside force acts upon it, this isotope will sit around and do its thing, stably, forever. They will emit energy in the form of ionizing radiation until this instability is sufficiently resolved.
American physical chemist Willard Libby led a team of scientists in the post World War II era to develop a method that measures radiocarbon activity.
He is credited to be the first scientist to suggest that the unstable carbon isotope called radiocarbon or carbon 14 might exist in living matter. Libby and his team of scientists were able to publish a paper summarizing the first detection of radiocarbon in an organic sample. Libby who first measured radiocarbon’s rate of decay and established 5568 years ± 30 years as the half-life. Libby was awarded the Nobel Prize in Chemistry in recognition of his efforts to develop radiocarbon dating.