The Library of Congress > Linked Data Service > LC Subject Headings (LCSH)


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  • Instance Of

  • Scheme Membership(s)

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  • Variants

    • Dvi-iodine
    • Eka-astatine
    • Ununseptium
  • Broader Terms

  • Closely Matching Concepts from Other Schemes

  • Earlier Established Forms

    • Ununseptium
  • Sources

    • found: Work cat.: Aldridge, S. Ununquadium, ununtrium, ununpentium, ununhexium, ununseptium, and ununoctium, 2012.
    • found: Wikipedia, Aug. 31, 2012(Ununseptium is the temporary name of a superheavy artificial chemical element with temporary symbol Uus and atomic number 117. The element, also known as eka-astatine or simply element 117, is the second-heaviest element of all created. Its discovery was first announced in 2010, when the element was claimed to have been created in Dubna by a joint Russian--American collaboration. Another experiment in 2011 created one of its daughters using a different method, partially proving the results of the discovery experiment, and the original experiment was repeated successfully in 2012. The International Union of Pure and Applied Chemistry (IUPAC), however, has made no comment on whether or not the element can be recognized as discovered. Element category: unknown. In the periodic table ununseptium is located in the group 17, all previous members of which are halogens. The element is unlikely to be a halogen, however, and will probably show differences, although a few key properties such as melting and boiling points and first ionization are expected to follow the periodic trends. Using Mendeleev's nomenclature for unnamed and undiscovered elements, ununseptium should be known as eka-astatine or dvi-iodine. In 1979 IUPAC published recommendations according to which the element was to be called ununseptium (with the corresponding symbol of Uus), a systematic element name as a placeholder, until the discovery of the element is confirmed and a name is decided on.)
    • found: The element ununseptium, via It's elemental : the periodic table of elements website, Aug. 31, 2012(Ununseptium; Uus; Atomic Number: 117; Atomic Weight: 294; Phase at Room Temperature: Expected to be a Solid; Element Classification: Unknown; Period Number: 7; Group Number: 17; Group Name: Halogen; radioactive and artificially produced; a temporary name that means one-one-seven; On April 5, 2010, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of ununseptium. They produced ununseptium by bombarding atoms of berkelium-249 with ions of calcium-48. Ununseptium's most stable isotope, ununseptium-294, has a half-life of about 112 milliseconds. It decays into ununpentium-290 through alpha decay.)
    • found: The element tennessine, via It's elemental : the periodic table of elements website, June 20, 2016(Tennessine; Ts; Atomic Number: 117; Atomic Weight: 294)
    • found: WebElements : the periodic table on the web, Aug. 31, 2012(Ununseptium; Uus; Atomic number: 117; Group in periodic table: 17; Group name: Halogen; Period in periodic table: 7; Block in periodic table: p-block; Colour: unknown, but probably metallic and dark in appearance; Classification: Unknown) June 20, 2016 (Tennessine; Ts; On 8 June 2016 IUPAC announced the new name tennessine (symbol Ts) for element 117 in place of the temporary systematic name ununseptium (Uus))
    • found: IUPAC is naming the four new elements nihonium, moscovium, tennessine, and oganesson, 8 June 2016, via International Union of Pure and Applied Chemistry website, viewed June 20, 2016(Tennessine and symbol Ts, for the element 117; for element with atomic number 117, the name proposed is tennessine with the symbol Ts; Tennessine is in recognition of the contribution of the Tennessee region, including Oak Ridge National Laboratory, Vanderbilt University, and the University of Tennessee at Knoxville, to superheavy element research, including the production and chemical separation of unique actinide target materials for superheavy element synthesis at ORNL's High Flux Isotope Reactor (HFIR) and Radiochemical Engineering Development Center (REDC))
  • Change Notes

    • 2012-08-31: new
    • 2016-09-10: revised
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