Hassium, 108 General properties Pronunciation Template:Infobox element/pronunciation Appearance silvery (predicted) [1] Standard atomic weight (A r, standard ) Template:Infobox element/standard atomic weight Mass number Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)Hassium in the periodic table Template:Infobox element/periodic table Atomic number (Z ) 108 Group Template:Infobox element/group Period period 7 Block d-block Element category Template:Infobox element/category format Electron configuration [Rn ] 5f14 6d6 7s2 [2] Electrons per shell
2, 8, 18, 32, 32, 14, 2 Physical properties Phase at STP solid (predicted) [3] Density (near r.t. ) 41 g/cm3 (predicted) [2] Atomic properties Oxidation states Template:Infobox element/symbol-to-oxidation-state [[Ionization energy|Template:Engvar energies]] 1st: 730 kJ/mol 2nd: 1760 kJ/mol 3rd: 2830 kJ/mol (more ) (all but first estimated) [2] Atomic radius empirical: 126 pm (estimated) [2] Covalent radius 134 pm (estimated) [4] Template:Infobox element/spectral lines Other properties Crystal structure Template:Infobox element/crystal structure (predicted) [3] CAS Number 54037-57-9 History Naming after Hassia , Latin for Hesse , Germany, where it was discovered[1] Discovery Gesellschaft für Schwerionenforschung (1984) Main isotopes of hassium Template:Infobox element/isotopes table | references
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↑ 1.0 1.1 Emsley, John (2011). Nature's Building Blocks: An A-Z Guide to the Elements (New ed.). New York, NY: Oxford University Press. p. 215–7. ISBN 978-0-19-960563-7 ↑ 2.0 2.1 2.2 2.3 Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media . ISBN 1-4020-3555-1 ↑ 3.0 3.1 Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B . 84 (11). Bibcode :2011PhRvB..84k3104O . doi :10.1103/PhysRevB.84.113104 . ↑ Robertson, Murray (2011). "Chemical Data: Hassium" . Visual Elements Periodic Table . Royal Society of Chemistry . Retrieved 28 November 2012 .