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- Monoisotopic_element abstract "A monoisotopic element is one of 26 chemical elements which have only a single stable isotope (nuclide). A list is given in a following section.Stability is experimentally defined for chemical elements, as there are a number of stable nuclides with atomic numbers over ~ 40 which are theoretically unstable, but apparently have half-lives so long that they have not been observed directly or indirectly (from measurement of products) to decay.Monoisotopic elements are characterized, except in a single case, by odd numbers of protons (odd Z), and even numbers of neutrons. Because of the energy gain from nuclear pairing effects, the odd number of protons imparts instability to isotopes of an odd-Z element, which typically requires at least a completely paired set of neutrons to offset into stability.The single mononuclidic exception is beryllium, which has 4 protons and 5 neutrons. This element is prevented from having equal numbers of neutrons and protons (4 of each) by the instability toward double-alpha decay, which is favored due to the extremely tight binding of helium-4 nuclei. It is prevented from having a stable isotope with 4 protons and 6 neutrons by the very large mismatch in proton/neutron ratio for such a light element. (Nevertheless, beryllium-10 has a half-life of 1.36 million years, which is too short to be primordial, but still indicates unusual stability for a light isotope with such an imbalance.)".
- Monoisotopic_element thumbnail Monoisotopic,_mononuclidic,_radioactive_elements.svg?width=300.
- Monoisotopic_element wikiPageExternalLink 7506x0683.pdf.
- Monoisotopic_element wikiPageID "27142273".
- Monoisotopic_element wikiPageRevisionID "598435079".
- Monoisotopic_element hasPhotoCollection Monoisotopic_element.
- Monoisotopic_element subject Category:Chemical_element_groups.
- Monoisotopic_element subject Category:Isotopes.
- Monoisotopic_element subject Category:Metrology.
- Monoisotopic_element type Abstraction100002137.
- Monoisotopic_element type Atom114619225.
- Monoisotopic_element type ChemicalElementGroups.
- Monoisotopic_element type Group100031264.
- Monoisotopic_element type Isotope114619658.
- Monoisotopic_element type Isotopes.
- Monoisotopic_element type Matter100020827.
- Monoisotopic_element type Part113809207.
- Monoisotopic_element type PhysicalEntity100001930.
- Monoisotopic_element type Relation100031921.
- Monoisotopic_element type Substance100019613.
- Monoisotopic_element comment "A monoisotopic element is one of 26 chemical elements which have only a single stable isotope (nuclide).".
- Monoisotopic_element label "Mono-isotopisch element".
- Monoisotopic_element label "Monoisotopic element".
- Monoisotopic_element label "Élément monoisotopique".
- Monoisotopic_element label "عنصر أحادي النظير".
- Monoisotopic_element label "单一同位素元素".
- Monoisotopic_element sameAs Élément_monoisotopique.
- Monoisotopic_element sameAs Mono-isotopisch_element.
- Monoisotopic_element sameAs m.0bwktd4.
- Monoisotopic_element sameAs Q3588104.
- Monoisotopic_element sameAs Q3588104.
- Monoisotopic_element sameAs Monoisotopic_element.
- Monoisotopic_element wasDerivedFrom Monoisotopic_element?oldid=598435079.
- Monoisotopic_element depiction Monoisotopic,_mononuclidic,_radioactive_elements.svg.
- Monoisotopic_element isPrimaryTopicOf Monoisotopic_element.
