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...in 0.012 kilogram of ¹²C (carbon-12).''<ref>The ¹²C isotope accounts for 98.89% of all carbon. It is one of two stable isotopes of the ...with an average mass does not exist. A single atom is by definition a pure isotope and has an isotopic&mdash;not an average&mdash;mass. Yet it is convenient t

...topic. For that reason the term nuclide is often used interchangeably with isotope in relation to a given chemical element.

|align="center"|'''[[Isotope]]'''

...ger, C. & Marcus, W. (2003). Diets of Southern African Bovidae: The Stable Isotope Evidence. ''Journal of Mammalogy'' 84, 471-479.

...rbed when an organism dies. Carbon-14 is a [[radioactivity|radioactive]] [[isotope]] with a [[half-life]] of 5,730 years; its long half-life means it can be u

...an application. A transuranic element, [[Californium]]'s ²⁵²Cf isotope is widely used as a portable source for analysis. <ref>{{citation

...breeding nuclear fuel; the preparation of [[radioactivity|radioactive]] [[isotope]]s for use in [[nuclear medicine]], industrial testing, or creating control ...ar fuel'''. The nuclear fuel consists of [[fissile isotope]]s, atoms of [[isotope]]s of high [[atomic number]] and [[Atomic mass|mass]] which can readily und

{{r|Isotope}}

...l similar in appearance and consistency to [[yttrium]]. The most abundant isotope of scandium is scandium-45, present in nearly 100% abundance. Twelve addit

...ill become unstable with the absorption of a single neutron. The resulting isotope decays by electron capture, which does not emit a particle other than a neu

...emical information (or parts thereof) with spatial information to generate isotope-specific images."

...use ¹³⁷[[Caesium]] as a photon source for radiography but this isotope has the disadvantage that it is always diluted with inactive caesium isotop half life, so by allowing a cobalt source to stand for a year much of this isotope will decay away.

...radioactivity, nuclear spin, and other parameters should be given for each isotope.

...ght be a question to ask him when I interview him. I wonder...Is there any isotope evidence about africanus or afarensis teeth that would agree or contradict

Naturally occurring cadmium is composed of eight [[isotope]]s. For two of them, natural [[radioactivity]] has been observed, and anoth ...sup>Cd). The primary [[decay mode]] before the second most abundant stable isotope, ¹¹²Cd, is [[electron capture]] and the primary modes after are

...[[biomechanics]], dental [[microwear]] analysis, [[isotope analysis|stable isotope analysis]], and [[paleoecology|paleoenvironmental reconstruction]]. Histor === Stable carbon isotope analysis ===

Perhaps by "ordinary helium" he meant helium-4 as opposed to some other isotope. I better change that back before he sees it!

...hemistry''' is the chemistry of radioactive materials, where radioactive [[isotope]]s of elements are used to study the properties and [[chemical reaction]]s All radioisotopes are unstable [[isotope]]s of [[chemical element|elements]]—undergo nuclear decay and emit some f

...iac.ornl.gov/trends/co2/contents.htm Atmospheric Carbon Dioxide and Carbon Isotope Records] - a compilation of independent records

...|isotopic]] [[desymmetrisation]] on the substrate (replacing hydrogen by [[isotope labeling|deuterium]]) it can be demonstrated that the reaction proceeds not