KnowraIsotopes of hydrogenLinked fromLinked fromThe 7 pages that link to Isotopes of hydrogen, each with the reason it gives.All 7Broader topic 1Related 2Narrower topic 3Compared with 1Heavy waterNarrower topic: Heavy water is defined by substituting a particular hydrogen isotope.ProtiumNarrower topic: Protium is the most abundant member of this isotope family.Semiheavy waterNarrower topic: The distinction between protium and deuterium defines semiheavy water.