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- Q466603 subject Q7215740.
- Q466603 subject Q8556480.
- Q466603 subject Q8597501.
- Q466603 abstract "Hydrogen (H) (relative atomic mass: 1.00794) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H. The first two of these are stable while 3H has a half-life of 12.32 years. All heavier isotopes are synthetic and have a half-life less than one zeptosecond (10−21 second). Of these, 5H is the most stable, and 7H is the least.Hydrogen is the only element whose isotopes have different names that are in common use today. The 2H (or hydrogen-2) isotope is usually called deuterium, while the 3H (or hydrogen-3) isotope is usually called tritium. The symbols D and T (instead of 2H and 3H) are sometimes used for deuterium and tritium. The IUPAC states in the 2005 Red Book that while the use of D and T is common, it is not preferred because it can cause problems in the alphabetic sorting of chemical formulae. The ordinary isotope of hydrogen, with no neutrons, is sometimes called "protium". (During the early study of radioactivity, some other heavy radioactive isotopes were given names, but such names are rarely used today.)".
- Q466603 thumbnail Protium_deuterium_tritium.jpg?width=300.
- Q466603 wikiPageExternalLink hydrogen-7-makes-its-debut.
- Q466603 wikiPageExternalLink nudat2.
- Q466603 wikiPageExternalLink pdf.
- Q466603 wikiPageExternalLink atomic-weights_revised05.html.
- Q466603 wikiPageExternalLink pdf.
- Q466603 wikiPageExternalLink Nubase2003.pdf.
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- Q466603 type Thing.
- Q466603 comment "Hydrogen (H) (relative atomic mass: 1.00794) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H. The first two of these are stable while 3H has a half-life of 12.32 years. All heavier isotopes are synthetic and have a half-life less than one zeptosecond (10−21 second). Of these, 5H is the most stable, and 7H is the least.Hydrogen is the only element whose isotopes have different names that are in common use today.".
- Q466603 label "Isotopes of hydrogen".
- Q466603 depiction Protium_deuterium_tritium.jpg.