核素列表

下表列出了所有天然同位素（包括半衰期極短的）以及902個的或半衰期大於一小時的所有核素。

圖表
穩定核素
理論上自發裂變比較可能發生在原子序大於40的元素，但尚未被觀測到，目前只有發現原子序大於82（鉛）的自发裂變核素。

下面的穩定核素是已觀測到放射性的不穩定核素候選：

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原生放射性核素
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非原生放射性核素
半衰期低於8千萬年的核素。

半衰期低於一日但超過1小時
半衰期之一小時以下的天然同位素
參見
*

• 核素圖

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• 放射性同位素
• 單核素元素
• 單一同位素元素

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• 依半衰期排列的放射性核素列表

參考文獻
Almost all data are taken from reference. For more recent updates, see reference. These sources do not indicate whether certain heavy isotopes starting from Lr, Rf, Db... (etc.) were produced, observed, or only predicted from estimated data.

*[http://www.nndc.bnl.gov/masses/mass.mas03 Experimental atomic mass data compiled Nov. 2003]
*[http://www.karlsruhenuclidechart.net#Introduction_to_the_Karlsruhe_Nuclide_Chart J. Magill, G. Pfennig, J. Galy "Karlsruher Nuclide Chart", 7th edition 2006, revised printing Nov. 2007]
*[http://www-nds.iaea.org/livechart The LIVEChart of Nuclides – IAEA] with dynamic half-life filtering
*[https://web.archive.org/web/20110723045720/http://adavidstubbs.home.comcast.net/~adavidstubbs/Quark/Isotope_table_%28compact-energy%29.htm Nice Overview picture for energy of nuclides]
*[http://isotopes.gov/ National Isotope Development Center] Reference information on isotopes, and coordination and management of isotope production, availability, and distribution
*[https://web.archive.org/web/20111019074945/http://science.energy.gov/np/research/idpra/ Isotope Development & Production for Research and Applications (IDPRA)] U.S. Department of Energy program for isotope production and production research and development