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- Isotopes_of_calcium abstract "Calcium (Ca) has a total of 24 isotopes, from 34Ca to 57Ca. There are five observationally stable isotopes (40Ca, 42Ca, 43Ca, 44Ca and 46Ca), plus one isotope (48Ca) with such a long half-life that for all practical purposes it can be considered stable. The most abundant isotope, 40Ca, as well as the rare 46Ca, are theoretically unstable on energetic grounds, but their decay has not been observed. Calcium also has a cosmogenic isotope, radioactive 41Ca, which has a half-life of 102,000 years. Unlike cosmogenic isotopes that are produced in the atmosphere, 41Ca is produced by neutron activation of 40Ca. Most of its production is in the upper metre or so of the soil column where the cosmogenic neutron flux is still sufficiently strong. 41Ca has received much attention in stellar studies because it decays to 41K, a critical indicator of solar-system anomalies. The most stable artificial radioisotope is 45Ca, with a half-life of 163 days.All other isotopes have half-lives of 163 days or less, most under a minute. The least stable is 34Ca with a half-life shorter than 35 nanoseconds.40Ca comprises about 97% of naturally occurring calcium. 40Ca is also one of the daughter products of 40K decay, along with 40Ar. While K-Ar dating has been used extensively in the geological sciences, the prevalence of 40Ca in nature has impeded its use in dating. Techniques using mass spectrometry and a double spike isotope dilution have been used for K-Ca age dating.Standard atomic mass: 40.078(4) u".
- Isotopes_of_calcium wikiPageExternalLink Ca_iso.htm.
- Isotopes_of_calcium wikiPageExternalLink pdf.
- Isotopes_of_calcium wikiPageExternalLink atomic-weights_revised05.html.
- Isotopes_of_calcium wikiPageExternalLink Calcium?topic=49557.
- Isotopes_of_calcium wikiPageExternalLink pdf.
- Isotopes_of_calcium wikiPageExternalLink Nubase2003.pdf.
- Isotopes_of_calcium wikiPageExternalLink nudat2.
- Isotopes_of_calcium wikiPageID "2527060".
- Isotopes_of_calcium wikiPageRevisionID "605254023".
- Isotopes_of_calcium element "calcium".
- Isotopes_of_calcium hasPhotoCollection Isotopes_of_calcium.
- Isotopes_of_calcium heavier "Isotopes of scandium".
- Isotopes_of_calcium lighter "Isotopes of potassium".
- Isotopes_of_calcium subject Category:Calcium.
- Isotopes_of_calcium subject Category:Isotopes_of_calcium.
- Isotopes_of_calcium subject Category:Lists_of_isotopes_by_element.
- Isotopes_of_calcium type Abstraction100002137.
- Isotopes_of_calcium type Atom114619225.
- Isotopes_of_calcium type Isotope114619658.
- Isotopes_of_calcium type IsotopesOfCalcium.
- Isotopes_of_calcium type Matter100020827.
- Isotopes_of_calcium type Part113809207.
- Isotopes_of_calcium type PhysicalEntity100001930.
- Isotopes_of_calcium type Relation100031921.
- Isotopes_of_calcium type Substance100019613.
- Isotopes_of_calcium comment "Calcium (Ca) has a total of 24 isotopes, from 34Ca to 57Ca. There are five observationally stable isotopes (40Ca, 42Ca, 43Ca, 44Ca and 46Ca), plus one isotope (48Ca) with such a long half-life that for all practical purposes it can be considered stable. The most abundant isotope, 40Ca, as well as the rare 46Ca, are theoretically unstable on energetic grounds, but their decay has not been observed. Calcium also has a cosmogenic isotope, radioactive 41Ca, which has a half-life of 102,000 years.".
- Isotopes_of_calcium label "Isotopen van calcium".
- Isotopes_of_calcium label "Isotopes of calcium".
- Isotopes_of_calcium label "Изотопы кальция".
- Isotopes_of_calcium label "نظائر الكالسيوم".
- Isotopes_of_calcium label "カルシウムの同位体".
- Isotopes_of_calcium label "鈣的同位素".
- Isotopes_of_calcium sameAs Ισότοπα_του_ασβεστίου.
- Isotopes_of_calcium sameAs Anexo:Isótopos_de_calcio.
- Isotopes_of_calcium sameAs カルシウムの同位体.
- Isotopes_of_calcium sameAs 칼슘_동위_원소.
- Isotopes_of_calcium sameAs Isotopen_van_calcium.
- Isotopes_of_calcium sameAs m.0118z397.
- Isotopes_of_calcium sameAs Q382952.
- Isotopes_of_calcium sameAs Q382952.
- Isotopes_of_calcium sameAs Isotopes_of_calcium.
- Isotopes_of_calcium wasDerivedFrom Isotopes_of_calcium?oldid=605254023.
- Isotopes_of_calcium isPrimaryTopicOf Isotopes_of_calcium.