Template:Infobox hassium

	child table, as reused in {IB-Hs} v; e; h;
Main isotopes of hassium

Hassium, ₁₀₈Hs
Hassium
Pronunciation	/ˈhæsiəm/ <phonos file="Hassium2009.ogg"></phonos> (HASS-ee-əm)
Mass number	[271] (data not decisive)
Hassium in the periodic table
	bohrium ← hassium → meitnerium
Atomic number (Z)	108
Group	group 8
Period	period 7
Block	d-block
Electron configuration	[Rn] 5f14 6d6 7s2
Electrons per shell	2, 8, 18, 32, 32, 14, 2
Physical properties
Phase at STP	solid (predicted)
Density (near r.t.)	27–29 g/cm3 (predicted)
Atomic properties
Oxidation states	(+2), (+3), (+4), (+6), +8 (parenthesized: prediction)
Ionization energies	1st: 730 kJ/mol ; 2nd: 1760 kJ/mol ; 3rd: 2830 kJ/mol ; (more) (predicted);
Atomic radius	empirical: 126 pm (estimated)
Covalent radius	134 pm (estimated)
Other properties
Natural occurrence	synthetic
Crystal structure	hexagonal close-packed (hcp) ; (predicted)
CAS Number	54037-57-9
History
Naming	after Hassia, Latin for Hesse, Germany, where it was discovered
Discovery	Gesellschaft für Schwerionenforschung (1984)
Isotopes of hassium v; e;
	Category: Hassium; view; talk; edit; \| references

Hs · Hassium
Bh ← ibox Bh	^iso ₁₀₈Hs [e] IB-Hs [e] IBisos [e]	→ Mt ibox Mt
cat:Hs (5) cat:Hs-isotopes (19) Commons Wikidata:Q1252 Wiktionary
indexes by PT (page) v e

Data sets read by {{Infobox element}}
Name and identifiers	view edit
Symbol etymology (11 non-trivial)	view edit
Top image (caption, alt)	view edit
Pronunciation	view edit
Allotropes (overview)	view edit
Group (overview)	view edit
Period (overview)	view edit
Block (overview)	view edit
Natural occurrence	view edit
Phase at STP	view edit
Oxidation states	view edit
Spectral lines image	view edit
Electron configuration (cmt, ref)	view edit
Isotopes
Standard atomic weight	view edit
most stable isotope	view edit
Wikidata
Wikidata *	view edit
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (12) · (this table: v )

References

^ Hassium. The Periodic Table of Videos. University of Nottingham. January 28, 2011. Retrieved October 19, 2012.
^ "Radioactive Elements". Commission on Isotopic Abundances and Atomic Weights. 2018. Retrieved 2020-09-20.
^ Audi et al. 2017, p. 030001-136.
^ Hoffman, Lee & Pershina 2006, p. 1672.
^ ^5.0 ^5.1 Östlin, A. (2013). "Transition metals". Electronic Structure Studies and Method Development for Complex Materials (PDF) (Licentiate). pp. 15–16. Retrieved 24 October 2019.
^ Gyanchandani, Jyoti; Sikka, S. K. (10 May 2011). "Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals". Physical Review B. 83 (17): 172101. doi:10.1103/PhysRevB.83.172101.
^ Kratz; Lieser (2013). Nuclear and Radiochemistry: Fundamentals and Applications (3rd ed.). p. 631.
^ 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. p. 1691. ISBN 978-1-4020-3555-5.
^ Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Retrieved 4 October 2013.
^ Düllmann, C. E. (2008). Investigation of group 8 metallocenes @ TASCA (PDF). 7th Workshop on Recoil Separator for Superheavy Element Chemistry TASCA 08. Archived from the original (PDF) on 30 April 2014. Retrieved 28 August 2020.
^ Hoffman, Lee & Pershina 2006, p. 1673.
^ Hoffman, Lee & Pershina 2006, p. 1691.
^ Robertson, M. (2011). "Chemical Data: Hassium". Visual Elements Periodic Table. Royal Society of Chemistry. Retrieved 28 November 2012.
^ Emsley, J. (2011). Nature's Building Blocks: An A–Z Guide to the Elements (New ed.). Oxford University Press. pp. 215–217. ISBN 978-0-19-960563-7.
^ ^15.0 ^15.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

^ 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, 46+56
−16 seconds, whereas that of ²⁶⁹Hs is 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 110±70 seconds, but only one event of decay of this isotope has been registered as of 2016^[update].^[2]^[3]

Source cites for short footnotes:

Audi, G.; Kondev, F. G.; Wang, M.; et al. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001. S2CID 126750783. Archived from the original (PDF) on 2020-08-01.
Hoffman, D. C.; Lee, D. M.; Pershina, V. (2006). "Transactinides and the future elements". In Morss, L. R.; Edelstein, N. M.; Fuger, J. (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Springer Science+Business Media. pp. 1652–1752. ISBN 978-1-4020-3555-5.

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[1] Hassium. The Periodic Table of Videos. University of Nottingham. January 28, 2011. Retrieved October 19, 2012.

[2] "Radioactive Elements". Commission on Isotopic Abundances and Atomic Weights. 2018. Retrieved 2020-09-20.

[FOOTNOTEAudi_et_al.2017030001-136-3] Audi et al. 2017, p. 030001-136.

[FOOTNOTEHoffmanLeePershina20061672-5] Hoffman, Lee & Pershina 2006, p. 1672.

[Oestlin-6] 5.0 ^5.1 Östlin, A. (2013). "Transition metals". Electronic Structure Studies and Method Development for Complex Materials (PDF) (Licentiate). pp. 15–16. Retrieved 24 October 2019.

[density-7] Gyanchandani, Jyoti; Sikka, S. K. (10 May 2011). "Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals". Physical Review B. 83 (17): 172101. doi:10.1103/PhysRevB.83.172101.

[kratz-8] Kratz; Lieser (2013). Nuclear and Radiochemistry: Fundamentals and Applications (3rd ed.). p. 631.

[9] 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. p. 1691. ISBN 978-1-4020-3555-5.

[Fricke1975-10] Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Retrieved 4 October 2013.

[hassocene-11] Düllmann, C. E. (2008). Investigation of group 8 metallocenes @ TASCA (PDF). 7th Workshop on Recoil Separator for Superheavy Element Chemistry TASCA 08. Archived from the original (PDF) on 30 April 2014. Retrieved 28 August 2020.

[FOOTNOTEHoffmanLeePershina20061673-12] Hoffman, Lee & Pershina 2006, p. 1673.

[FOOTNOTEHoffmanLeePershina20061691-13] Hoffman, Lee & Pershina 2006, p. 1691.

[rsc-14] Robertson, M. (2011). "Chemical Data: Hassium". Visual Elements Periodic Table. Royal Society of Chemistry. Retrieved 28 November 2012.

[Emsley2011-15] Emsley, J. (2011). Nature's Building Blocks: An A–Z Guide to the Elements (New ed.). Oxford University Press. pp. 215–217. ISBN 978-0-19-960563-7.

[NUBASE2020-16] 15.0 ^15.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

[most_stable_isotope-4] 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, 46+56
−16 seconds, whereas that of ²⁶⁹Hs is 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 110±70 seconds, but only one event of decay of this isotope has been registered as of 2016^[update].^[2]^[3]

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