How many isotopes of carbon exist?
Just how many carbon isotopes are there? Carbon has as many as 15 isotopes! They all have an atomic number of 6, but differ in their atomic masses. Though they all have the same number of protons (6), each one differs in the number of neutrons, in the nucleus. Most of them are radioactive. Radioactivity indicates that these nuclei are unstable and decay by emitting ionizing radiation. Here is a list of all the isotopes of carbon, along with some of their most important properties. You might want to check out the list of radioactive elements.