Carbon-14
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Carbon-14 is a radioactive isotope of carbon discovered February 27, 1940, by Martin Kamen and Sam Ruben. Its nucleus contains 6 protons and 8 neutrons. Its presence in organic materials is used in radiocarbon dating.
The half-life of carbon-14 is 5730 years. It decays into nitrogen-14 through beta-decay.
See also
References
Kamen, Martin D. Radiant Science, Dark Politics: A Memoir of the Nuclear Age, Forward by Edwin M. McMillan, Berkeley: University of California Press, 1985.fr:Carbone 14 pt:Carbono-14 zh:碳14