Carbon-14, 14C, or radiocarbon,'s a radioactive isotope of carbon discovered on February 27, 1940, by Martin Kamen and Sam Ruben at the University of California Radiation Laboratory in Berkeley, though its existence had been suggested already in 1934 by Franz Kurie. Its nucleus contains 6 protons and 8 neutrons. Its presence in organic materials's the basis of the radiocarbon dating method to date archaeological, geological, and hydrogeological samples. There're three naturally occurring isotop… (More on Carbon-14)