In a decayThe spontaneous conversion of a nuclide into another nuclide... chain of radioactive substancesRadioactive substances within the meaning of the Atomic Ener..., the daughter nuclideA nuclide is a type of atom characterized by its proton numb... followed by the grandchild nuclideA nuclide is a type of atom characterized by its proton numb... are the decayThe spontaneous conversion of a nuclide into another nuclide... products of a parent nuclideA nuclide is a type of atom characterized by its proton numb.... Example: iodine-137 (parent nuclideA nuclide is a type of atom characterized by its proton numb...) decays via xenon-137 (daughter), caesium-137 (grandchild), barium-137m (great-grandchild) into the stable barium-137 (great-great-grandchild). (See also ‘decayThe spontaneous conversion of a nuclide into another nuclide... chain, natural’)
Parent / daughter / grandchild nuclides in the decayThe spontaneous conversion of a nuclide into another nuclide... chain of iodine-137 to barium-137