11/1/2023 0 Comments Neutron 3 izotope![]() ![]() Presumably the differential concentration of deuterium in the inner solar system is due to the lower volatility of deuterium gas and compounds, enriching deuterium fractions in comets and planets exposed to significant heat from the Sun over billions of years of solar system evolution.ĭeuterium is not radioactive, and does not represent a significant toxicity hazard. Deuterium on Earth has been enriched with respect to its initial concentration in the Big Bang and the outer solar system (about 27 ppm, by atom fraction) and its concentration in older parts of the Milky Way galaxy (about 23 ppm). Deuterium comprises 0.0026–0.0184% (by population, not by mass) of hydrogen samples on Earth, with the lower number tending to be found in samples of hydrogen gas and the higher enrichment (0.015% or 150 ppm) typical of ocean water. The nucleus of deuterium is called a deuteron. ![]() (atomic mass 2.014 101 777 844(15) Da), the other stable hydrogen isotope, is known as deuterium and contains one proton and one neutron in its nucleus. (During the early study of radioactivity, some other heavy radioactive isotopes were given names, but such names are rarely used today.)Ī deuterium atom contains one proton, one neutron, and one electron. , with no neutrons, is sometimes called protium. ) instead to avoid confusion in the alphabetic sorting of chemical formulas. The IUPAC accepts the D and T symbols, but recommends using standard isotopic symbols ( 2 The symbols D and T are sometimes used for deuterium and tritium. (or hydrogen-2) isotope is deuterium and the 3 ![]() Hydrogen is the only element whose isotopes have different names that remain in common use today: the 2 Heavier isotopes also exist, all of which are synthetic and have a half-life of less than one zeptosecond (10 −21 s). Hydrogen ( 1H) has three naturally occurring isotopes, sometimes denoted 1 The three most stable isotopes of hydrogen: protium ( A = 1), deuterium ( A = 2), and tritium ( A = 3). ![]()
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