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...ments may have stable (i.e., non-radioactive) and radioactive (unstable) [[isotope]]s—all the isotopes of a given chemical element have the same number ...ccurring isotope, or if an artificial (man-made) element, having no stable isotope. Of the elements with atomic numbers less than Z=84, only technetium (Tc,

...s little [[plutonium]], and that plutonium is rich in ²⁴⁰Pu, an isotope highly undesirable for bombs.

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...large compounds like proteins. Deuterium is a stable, naturally occurring isotope of hydrogen and represents 0.015% of naturally occurring hydrogen, with H-1

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...will make ("breed") potential nuclear fuel of an appropriate [[plutonium]] isotope. Economically, it seems attractive when a reactor can produce 30 percent mo

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...weights of the elements|standard atomic weight]] of ¹⁴⁵Pm, its isotope with the longest [[half-life]] (17.7 years) is 144.9127 g•mol<sup> −1</

| [[Isotope]] | [[Isotope]]

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The helium atom has two stable [[isotope]]s, ³H and ⁴He.

...harge]]. An &alpha;-particle is in fact the nucleus of the [[helium]]-4 [[isotope]], consisting of two [[proton]]s and two [[neutron]]s, thus having a mass c ...ties of the "uranium rays" (thus named because the most common [[uranium]] isotope, ²³⁸U, is an &alpha; emitter and uranium salts were used as a so

! Isotope !! Half-life !! Spin !! Abundance (%)

In atom physics, [[isotope]]s of an element are distinguished or to a helium isotope and emit a neutron:

...ith a fresh isotope, the methods were logistically problematic because the isotope was short-lived and the source would become less reliable over time. ...y source, '''Dual Energy Xray Absorptiometry''' (DEXA) did away with the isotope decay problem, and is the current "gold standard". <ref name=Wash>{{citatio

...of the mass<ref>Formerly called atomic weight</ref> of the most abundant [[isotope]], ¹²C, is by definition the [[unified atomic mass unit]]: ''A'' Carbon has many [[isotope|isotopes]] (from ''A'' = 8 to 22). Two are stable, and another is very lon

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

The isotope ⁸⁵Kr is emitted by the process of producing [[plutonium]], and a