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Hassium

LC control no.sh2012003723
LC classificationQD181.H8 General and inorganic chemistry
QD412.H8 Organometallic chemistry
QD464.H8 Atomic and molecular weights
Topical headingHassium
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Variant(s)Eka-osmium
Hahnium
Unniloctium
See alsoSuperheavy elements
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Transition metals
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Found inWork cat.: Düllmann, Ch.E. Chemical investigations of element 108, hassium (Hs), 2003: p. 1 (transactinide elements)
Hall, L.E. The transactinides : rutherfordium, dubnium, seaborgium, bohrium, hassium, meitnerium, darmstadtium, roentgenium, 2010: p. 11 (Bohrium, hassium, and meitnerium were discovered in the 1970s and 1980s) p. 34 (Hassium is a member of group 8, with homologues of iron, ruthenium, and osmium. Two compounds of hassium have been made, HsO₄ and Na₂[HsO₄(OH)₂].)
Wikipedia, Sept. 18, 2012 (Hassium; a synthetic element with the symbol Hs and atomic number 108. It is the heaviest member of the group 8 (VIII) elements. The element was first observed in 1984. Experiments have confirmed that hassium is a typical member of group 8 showing a stable +8 oxidation state, analogous to osmium. Hassium is the heavier homologue of osmium; Hassium has historically been known as eka-osmium. During the period of controversy over the names of the elements IUPAC adopted unniloctium (symbol Uno) as a temporary element name for this element. The name hassium was proposed by the officially recognised German discoverers in 1992, derived from the Latin name for the German state of Hesse where the institute is located (Latin: Hassia German: Hessen). In 1994 a committee of IUPAC recommended that element 108 be named hahnium (Hn), in spite of the long-standing convention to give the discoverer the right to suggest a name. After protests from the German discoverers, the name hassium (Hs) was adopted internationally in 1997)
The element hassium, via It's elemental website, Sept. 18, 2012 (Hs; Hassium; Atomic Number: 108 Atomic Weight: 277; Element Classification: Metal; Period Number: 7; Group Number: 8; Group Name: none; Radioactive and Artificially Produced; Hassium was first produced by Peter Armbruster, Gottfried Münzenber and their team working at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany in 1984)
ChemicalElements.com, Sept. 18, 2012 (Name: Hassium Symbol: Hs; Atomic Number: 108; Atomic Mass: (265.0) amu; Number of Protons/Electrons: 108; Number of Neutrons: 157; Classification: Transition Metal; Other Names: Unniloctium (Uno), Hahnium (Hn), Hassium (Hs))
WebElements website, Sept. 18, 2012 (Hassium; Hs; a synthetic element that is not present in the environment at all; Name: Hassium; Symbol: Hs; Atomic number: 108; Group in periodic table: 8; Group name: (none); Period in periodic table: 7; Block in periodic table: d-block; Colour: unknown, but probably metallic and silvery white or grey in appearance; Classification: Metallic)