carbon 12 13 and 14 are the three isotopes of carbon. All carbon atoms have 6 protons but the number of protons can vary. The number is the atomic mass, or the sum of the protons ans neutrons. read more
Carbon-12 and 13 are stable isotopes, which means that the nucleus does not undergo radioactive decay. Carbon-14 possesses an unstable nucleus which undergoes radioactive decay. One of the neutrons in carbon-14 is changed to a proton through the process of beta decay. read more
Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each atom. The number given after the atom name (carbon) indicates the number of protons plus neutrons in an atom or ion. read more