Oxygen-16: Difference between revisions
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'''Oxygen-16''' (<sup>16</sup>O) is a [[stable isotope|stable]] [[isotopes of oxygen|isotope of oxygen]], having 8 [[neutron]]s and 8 [[proton]]s in its [[atomic nucleus|nucleus]]. It has a mass of {{val|15.99491461956|u=u}}. Oxygen-16 is the most abundant isotope of oxygen and accounts for 99.762% of oxygen's [[natural abundance]].<ref>{{cite web|url=http://www.ncsu.edu/ncsu/pams/chem/msf/pdf/IsotopicMass_NaturalAbundance.pdf |title=Table of Isotopic Masses and Natural Abundances |date=1999 |format=PDF}}</ref> The relative and absolute abundance of <sup>16</sup>O are high because it is a principal product of [[stellar evolution]] and because it is a [[primordial isotope]], meaning it can be made by stars that were [[Population III stars|initially made exclusively of hydrogen]]. Most <sup>16</sup>O is synthesized at the end of the [[helium fusion]] process in stars; the [[triple-alpha process]] creates <sup>12</sup>C, which captures an additional <sup>4</sup>He to make <sup>16</sup>O. The [[neon-burning process]] creates additional <sup>16</sup>O. |
'''Oxygen-16''' (<sup>16</sup>O) is a [[stable isotope|stable]] [[isotopes of oxygen|isotope of oxygen]], having 8 [[neutron]]s and 8 [[proton]]s in its [[atomic nucleus|nucleus]]. It has a mass of {{val|15.99491461956|u=u}}. Oxygen-16 is the most abundant isotope of oxygen and accounts for 99.762% of oxygen's [[natural abundance]].<ref>{{cite web|url=http://www.ncsu.edu/ncsu/pams/chem/msf/pdf/IsotopicMass_NaturalAbundance.pdf |title=Table of Isotopic Masses and Natural Abundances |date=1999 |format=PDF}}</ref> The relative and absolute abundance of <sup>16</sup>O are high because it is a principal product of [[stellar evolution]] and because it is a [[primordial isotope]], meaning it can be made by stars that were [[Population III stars|initially made exclusively of hydrogen]]. Most <sup>16</sup>O is synthesized at the end of the [[helium fusion]] process in stars; the [[triple-alpha process]] creates <sup>12</sup>C, which captures an additional <sup>4</sup>He to make <sup>16</sup>O. The [[neon-burning process]] creates additional <sup>16</sup>O. my dog is old |
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Solid samples (organic and inorganic) for <sup>16</sup>O studies are usually stored in silver cups and measured with [[pyrolysis]] and [[mass spectrometry]].<ref name=":0">{{Cite journal|last=Tsang|first=Man-Yin|last2=Yao|first2=Weiqi|last3=Tse|first3=Kevin|date=2020|editor-last=Kim|editor-first=Il-Nam|title=Oxidized silver cups can skew oxygen isotope results of small samples|url=https://www.cambridge.org/core/product/identifier/S2516712X20000155/type/journal_article|journal=Experimental Results|language=en|volume=1|pages=e12|doi=10.1017/exp.2020.15|issn=2516-712X|doi-access=free}}</ref> Researchers need to avoid improper or prolonged storage of the samples for accurate measurements.<ref name=":0" /> |
Solid samples (organic and inorganic) for <sup>16</sup>O studies are usually stored in silver cups and measured with [[pyrolysis]] and [[mass spectrometry]].<ref name=":0">{{Cite journal|last=Tsang|first=Man-Yin|last2=Yao|first2=Weiqi|last3=Tse|first3=Kevin|date=2020|editor-last=Kim|editor-first=Il-Nam|title=Oxidized silver cups can skew oxygen isotope results of small samples|url=https://www.cambridge.org/core/product/identifier/S2516712X20000155/type/journal_article|journal=Experimental Results|language=en|volume=1|pages=e12|doi=10.1017/exp.2020.15|issn=2516-712X|doi-access=free}}</ref> Researchers need to avoid improper or prolonged storage of the samples for accurate measurements.<ref name=":0" /> |
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Revision as of 22:25, 22 September 2021
 | This article needs additional citations for verification. (February 2020) |
| General | |
|---|---|
| Symbol | 16O |
| Names | oxygen-16, 16O, O-16, Oxygen - 16 |
| Protons (Z) | 8 |
| Neutrons (N) | 8 |
| Nuclide data | |
| Natural abundance | 99.76% |
| Half-life (t1/2) | stable |
| Isotope mass | 15.99491461956 Da |
| Spin | 0 |
| Excess energy | −4737.00135(16)[1] keV |
| Isotopes of oxygen Complete table of nuclides | |
Oxygen-16 (16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus. It has a mass of 15.99491461956 u. Oxygen-16 is the most abundant isotope of oxygen and accounts for 99.762% of oxygen's natural abundance.[2] The relative and absolute abundance of 16O are high because it is a principal product of stellar evolution and because it is a primordial isotope, meaning it can be made by stars that were initially made exclusively of hydrogen. Most 16O is synthesized at the end of the helium fusion process in stars; the triple-alpha process creates 12C, which captures an additional 4He to make 16O. The neon-burning process creates additional 16O. my dog is old
Solid samples (organic and inorganic) for 16O studies are usually stored in silver cups and measured with pyrolysis and mass spectrometry.[3] Researchers need to avoid improper or prolonged storage of the samples for accurate measurements.[3]
References
- ^ Wang, M.; Audi, G.; Kondev, F. G.; Huang, W. J.; Naimi, S.; Xu, X. (2017). "The AME2016 atomic mass evaluation (II). Tables, graphs, and references" (PDF). Chinese Physics C. 41 (3): 030003–8. doi:10.1088/1674-1137/41/3/030003.
- ^ "Table of Isotopic Masses and Natural Abundances" (PDF). 1999.
- ^ a b Tsang, Man-Yin; Yao, Weiqi; Tse, Kevin (2020). Kim, Il-Nam (ed.). "Oxidized silver cups can skew oxygen isotope results of small samples". Experimental Results. 1: e12. doi:10.1017/exp.2020.15. ISSN 2516-712X.
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