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  2. Isotopes of carbon - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_carbon

    Carbon (6 C) has 14 known isotopes, from 8 C to 20 C as well as 22 C, of which 12 C and 13 C are stable.The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. . This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reactio

  3. List of radioactive nuclides by half-life - Wikipedia

    en.wikipedia.org/wiki/List_of_radioactive...

    Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.

  4. List of nuclides - Wikipedia

    en.wikipedia.org/wiki/List_of_nuclides

    This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopes of the first 105 elements, except for elements 87 ( francium ), 102 ( nobelium ) and 104 ( rutherfordium ).

  5. Carbon-14 - Wikipedia

    en.wikipedia.org/wiki/Carbon-14

    Carbon-14, C-14, 14 C or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.Its presence in organic matter is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples.

  6. Radionuclide - Wikipedia

    en.wikipedia.org/wiki/Radionuclide

    Radioactive nonprimordial, but naturally occurring on Earth. 61 347 Carbon-14 (and other isotopes generated by cosmic rays) and daughters of radioactive primordial elements, such as radium, polonium, etc. 41 of these have a half life of greater than one hour. Radioactive synthetic half-life ≥ 1.0 hour). Includes most useful radiotracers. 662 989

  7. Environmental isotopes - Wikipedia

    en.wikipedia.org/wiki/Environmental_isotopes

    Radioactive isotopes are isotopes that will decay into a different isotope. For example, 3 H is a radioactive isotope of hydrogen. It decays into 3 He with a half-life of ~12.3 years. By comparison, stable isotopes do not undergo radioactive decay, and their fixed proportions are measured against exponentially decaying proportions of ...

  8. The Brick Companies Converts Entire Maryland Portfolio to 100 ...

    www.aol.com/2012/09/25/the-brick-companies...

    The Brick Companies Converts Entire Maryland Portfolio to 100 Percent WGES CleanSteps WindPower and Reduces its Carbon Footprint Purchase will prevent 7,999 metric tons of carbon dioxide ...

  9. List of Maryland companies - Wikipedia

    en.wikipedia.org/?title=List_of_Maryland...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=List_of_Maryland_companies&oldid=956938030"