KnowraProtiumLinked fromLinked fromThe 6 pages that link to Protium, each with the reason it gives.All 6Broader topic 3Related 1Compared with 2HydrogenBroader topic: This isotope matches the usual hydrogen atom described by the element’s simplest model.Isotopes of hydrogenBroader topic: It is the lightest and most abundant hydrogen isotope.HydronBroader topic: Its positive ion is the familiar proton, one member of the hydron family.