What is another word for protium?
Pronunciation: [pɹˈə͡ʊti͡əm] (IPA) 
Protium is the most common isotope of hydrogen, which is an element with a single proton and one electron. There are no synonyms for the word protium per se; however, some scientists refer to it as hydrogen-1 or simply H-1 to denote its atomic mass number of one. Deuterium and tritium are other isotopes of hydrogen that scientists use to differentiate hydrogen atoms by the number of neutrons they contain. Deuterium has one neutron and is called hydrogen-2, while tritium has two neutrons and is referred to as hydrogen-3. While these isotopes of hydrogen are chemically similar, they exhibit different physical properties that scientists can exploit in various applications.
