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    Stable nuclide - Wikipedia

    • Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay. When these nuclides are referred to in rel… See more

    Definition of stability, and naturally occurring nuclides

    Most naturally occurring nuclides are stable (about 251; see list at the end of this article), and about 35 more (total of 286) are … See more

    Isotopes per element

    Of the known chemical elements, 80 elements have at least one stable nuclide. These comprise the first 82 elements from hydrogen to lead, with the two exceptions, technetium (element 43) and promethium (element 61… See more

    Still-unobserved decay

    It is expected that improvement of experimental sensitivity will allow discovery of very mild radioactivity of some isotopes now considered stable. For example, in 2003 it was reported that bismuth-209 (the only primor… See more

    List of stable nuclides

    The primordial radionuclides are included for comparison; they are italicized and offset from the list of stable nuclides proper.
    Abbreviations for predicted unobserved decay:
    α for alpha … See more

    See also

    • Isotope geochemistry
    • List of elements by stability of isotopes
    • List of nuclides (991 nuclides in order of stability, all with half-lives over one hour)… See more

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