Template:Infobox tennessine/sandbox

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[[Category:Template:Pagetype with short description]]

Ununseptium, 117Uus
Ununseptium
Appearancesemimetallic (predicted)[1]
Ununseptium in the periodic table
Template:Periodic table (32 columns, micro) At

Uus

(Usu)
livermoriumununseptiumununoctium
Atomic number (Z)117
Groupgroup 17 (halogens)
Periodperiod 7
Block
Element categories, but probably a metalloid
Electron configuration(predicted)[2]
Electrons per shell2, 8, 18, 32, 32, 18, 7 (predicted)
Physical properties
Phase at STPsolid (predicted)[2][3]
Melting point573–773 K ​(300–500 °C, ​572–932 °F) (predicted)[2]
Boiling point823 K ​(550 °C, ​1022 °F) (predicted)[2]
Density (near r.t.)7.1–7.3 g/cm3 (extrapolated)[3]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state: Symbol "Uus" not known
Ionization energies
  • 1st: 742.9 kJ/mol (prediction)[2]
  • 2nd: 1785.0–1920.1 kJ/mol (extrapolated)[3]
Atomic radiusempirical: 138 pm (predicted)[3]
Covalent radius156–157 pm (extrapolated)[3]
Other properties
CAS Number54101-14-3
History
NamingIUPAC systematic element name
DiscoveryJoint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2010)
Main isotopes of ununseptium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
294Uus syn 78+370
−36
ms
α 290Uup
293Uus syn 14+11
−4
ms
α 289Uup
Category Category: Ununseptium
| references

References

  1. 1.0 1.1 Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. 21: 89–144. doi:10.1007/BFb0116498. Retrieved 4 October 2013.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Haire, Richard G. (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. pp. 1724, 1728. ISBN 1-4020-3555-1.
  3. 3.0 3.1 3.2 3.3 3.4 Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the Properties of the 113–120 Transactinide Elements". Journal of Physical Chemistry. American Chemical Society. 85 (9): 1177–1186. doi:10.1021/j150609a021.

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