Template:Infobox hassium

{{Infobox element

|engvar ={{{engvar|}}}

|symbol =Hs

|Z =108

|number =108

|name =hassium

|mass number comment=(data not decisive){{efn|name="most stable isotope"|The most stable isotope of hassium cannot be determined based on existing data due to uncertainty that arises from the low number of measurements. The half-life of ²⁷¹Hs corresponding to one standard deviation is, based on existing data, {{val|46|56|16}} seconds, whereas that of ²⁶⁹Hs is {{val|13|10|4}} seconds; these measurements have overlapping confidence intervals. It is also possible that ^277mHs is more stable than both of these, with its half-life likely being {{val|110|70}} seconds, but only one event of decay of this isotope has been registered {{as of|2016|lc=y}}.{{Cite web|title=Radioactive Elements|url=https://ciaaw.org/radioactive-elements.htm|date=2018|access-date=2020-09-20|website=Commission on Isotopic Abundances and Atomic Weights}}{{sfn|Audi et al.|2017|p=030001-136}}}}

|abundance=

|abundance in earth's crust=

|abundance in oceans=

|abundance in solar system=

|left=bohrium

|right=meitnerium

|above=Os

|below=—

|appearance=

|electrons per shell=2, 8, 18, 32, 32, 14, 2

|electrons per shell comment=

|phase=solid

|phase comment=(predicted)

|density gpcm3nrt=27–29

|density gpcm3nrt comment=(predicted){{cite journal |last1=Gyanchandani |first1=Jyoti |last2=Sikka |first2=S. K. |title=Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals |journal=Physical Review B |date=10 May 2011 |volume=83 |issue=17 |pages=172101 |doi=10.1103/PhysRevB.83.172101}}{{cite book |last1=Kratz |last2=Lieser |title=Nuclear and Radiochemistry: Fundamentals and Applications |date=2013 |page=631 |edition=3rd}}

|crystal structure=hexagonal close-packed

|crystal structure comment=(predicted){{cite thesis |last=Östlin |first=A. |date=2013 |title=Electronic Structure Studies and Method Development for Complex Materials |type=Licentiate |chapter=Transition metals |pages=15–16 |url=https://www.diva-portal.org/smash/get/diva2:606386/FULLTEXT01.pdf |access-date=24 October 2019}}

|number of ionization energies=8

|ionization energy comment=(predicted){{sfn|Hoffman|Lee|Pershina|2006|p=1673}}

|ionization energy 1=730

|ionization energy 2=1760

|ionization energy 3=2830

|atomic radius=126

|atomic radius comment=(estimated){{sfn|Hoffman|Lee|Pershina|2006|p=1691}}

|covalent radius=134

|covalent radius comment=(estimated){{cite web |url=http://www.rsc.org/periodic-table/element/108/hassium |title=Chemical Data: Hassium |last1=Robertson |first1=M. |date=2011 |work=Visual Elements Periodic Table |publisher=Royal Society of Chemistry |access-date=28 November 2012}}

|CAS number=54037-57-9

|magnetic susceptibility=

|magnetic susceptibility ref=

|naming=after {{lang|la|Hassia}}, Latin for Hesse, Germany, where it was discovered{{cite book|last=Emsley|first=J.|title=Nature's Building Blocks: An A–Z Guide to the Elements|edition=New|year=2011|publisher=Oxford University Press|isbn=978-0-19-960563-7|pages=215–217}}

|discovered by=Gesellschaft für Schwerionenforschung

|discovery date=1984

|QID=Q1252

}}

:Source cites for short footnotes:

:* {{cite journal |title=The NUBASE2016 evaluation of nuclear properties |doi=10.1088/1674-1137/41/3/030001 |last1=Audi |first1=G. |last2=Kondev |first2=F. G. |last3=Wang |first3=M. |last4=Huang |first4=W. J. |last5=Naimi |first5=S. |display-authors=3 |journal=Chinese Physics C |volume=41 |issue=3 |pages=030001 |year=2017|bibcode=2017ChPhC..41c0001A |s2cid=126750783 |ref={{harvid|Audi et al.|2017}} |url=http://pdfs.semanticscholar.org/7c02/89532fe80c913edd952e8caffd555013f596.pdf |archive-url=https://web.archive.org/web/20200801004253/http://pdfs.semanticscholar.org/7c02/89532fe80c913edd952e8caffd555013f596.pdf |url-status=dead |archive-date=2020-08-01 }}

:* {{cite book |last1=Hoffman |first1=D. C. |last2=Lee |first2=D. M. |last3=Pershina |first3=V. |year=2006 |chapter=Transactinides and the future elements |title=The Chemistry of the Actinide and Transactinide Elements |url=https://archive.org/details/chemistryactinid00katz|url-access=limited| editor1-last=Morss| editor-first=L. R.|editor2-first=N. M.| editor2-last=Edelstein| editor3-last=Fuger |editor3-first=J. |publisher= Springer Science+Business Media |isbn=978-1-4020-3555-5 |edition=3rd |pages=[https://archive.org/details/chemistryactinid00katz/page/n2003 1652]–1752}}