what are isotones?
Isoton, one of two or more types of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 have 19 protons and 20 neutrons in the nucleus of this potassium species, while the nucleus of this chlorine species consists of 17 protons and 20 neutrons. It is isotonic because it contains neutrons.
