Which selection from the article does NOT explain a part of the process of releasing radiation through radioactivity? (A) Atoms of the same chemical can have different numbers of neutrons. Some 99 percent of carbon atoms have six neutrons, when added to the six protons this gives an atomic mass of 12. (B) Decay occurs naturally and spontaneously to unstable nuclei. This instability is usually caused by a mismatch between the number of protons and neutrons. (C) Neutron release, alpha and beta decay are all accompanied by the release of a particle. It is the particle (or the gamma ray in gamma decay) that is the "radiation" associated with radioactivity These wavelengths of electromagnetic radiation contain enough energy to push an electron out of its orbit around the atom, yet again forming an ion. (D)​