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Radioactive krypton-81 is the product of spallation reactions with cosmic rays striking gases present in the Earth atmosphere, along with the six stable or nearly stable krypton isotopes. [11] Krypton-81 has a half-life of about 229,000 years. Krypton-81 is used for dating ancient (50,000- to 800,000-year-old) groundwater and to determine their ...
The darker more stable isotope region departs from the line of protons (Z) = neutrons (N), as the element number Z becomes larger. This is a list of chemical elements by the stability of their isotopes. Of the first 82 elements in the periodic table, 80 have isotopes considered to be stable. [1] Overall, there are 251 known stable isotopes in ...
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Pages in category "Isotopes of krypton" The following 48 pages are in this category, out of 48 total. This list may not reflect recent changes. ...
Pages in category "Lists of isotopes by element" The following 122 pages are in this category, out of 122 total. ... Isotopes of krypton; L. Isotopes of lanthanum;
Krypton has several isotopes, with 78, 80, 82 Kr being primordial, while 83,84, 86 Kr results from spontaneous fission of 244 Pu and radiogenic decay of 238 U. [113] [97] Krypton's isotopes geochemical signature in mantle reservoirs resembling the modern atmosphere. preserves the solar-like primordial signature. [114]
Naturally occurring krypton in Earth's atmosphere is composed of five stable isotopes, plus one isotope (78 Kr) with such a long half-life (9.2×10 21 years) that it can be considered stable. (This isotope has the third-longest known half-life among all isotopes for which decay has been observed; it undergoes double electron capture to 78 Se ).
Isotopes of krypton (48 P) Pages in category "Krypton" The following 5 pages are in this category, out of 5 total. ... Organokrypton chemistry; T. Morris Travers