Template:Infobox copernicium/sandbox

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

Copernicium, 112Cn
Copernicium
Pronunciation/ˌkpərˈnɪsiəm/ (Template:Respell)
Appearanceunknown
Mass number[285]
Copernicium in the periodic table
Template:Periodic table (32 columns, micro) Hg

Cn

(Uhq)
roentgeniumcoperniciumununtrium
Atomic number (Z)112
Groupgroup 12
Periodperiod 7
Block  d-block
Electron configuration[Rn] 5f14 6d10 7s2 (predicted)[1] (predicted)[1]
Electrons per shell2, 8, 18, 32, 32, 18, 2 (predicted)
Physical properties
Phase at STPunknown
Boiling point357+112
−108
 K ​(84+112
−108
 °C, ​183+202
−194
 °F)[2]
Density (near r.t.)23.7 g/cm3 (predicted)[1]
Atomic properties
Oxidation states0, (+1), +2, (+4) (parenthesized: prediction)[1][3][4]
Ionization energies
  • 1st: 1154.9 kJ/mol
  • 2nd: 2170.0 kJ/mol
  • 3rd: 3164.7 kJ/mol
  • (more) (all estimated)[1]
Atomic radiusempirical: 147 pm (predicted)[1][4]
Covalent radius122 pm (predicted)[5]
Other properties
Natural occurrencesynthetic
Crystal structurehexagonal close-packed (hcp)
Hexagonal close-packed crystal structure for copernicium

(predicted)[6]
CAS Number54084-26-3
History
Namingafter Nicolaus Copernicus
DiscoveryGesellschaft für Schwerionenforschung (1996)
Main isotopes of copernicium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
285Cn syn 29 s α 281Ds
285mCn ? syn 8.9 min α 281mDs ?
283Cn syn 4 s[7] 90% α 279Ds
10% SF
283mCn ?? syn ~7.0 min SF
Category Category: Copernicium
| references

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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 978-1-4020-3555-5. Cite error: Invalid <ref> tag; name "Haire" defined multiple times with different content
  2. Eichler, R.; Aksenov, N. V.; Belozerov, A. V.; Bozhikov, G. A.; Chepigin, V. I.; Dmitriev, S. N.; Dressler, R.; Gäggeler, H. W.; et al. (2008). "Thermochemical and physical properties of element 112". Angewandte Chemie. 47 (17): 3262–6. doi:10.1002/anie.200705019. Retrieved 5 November 2013.
  3. 3.0 3.1 Gäggeler, Heinz W.; Türler, Andreas (2013). "Gas Phase Chemistry of Superheavy Elements". The Chemistry of Superheavy Elements. Springer Science+Business Media. pp. 415–483. doi:10.1007/978-3-642-37466-1_8. ISBN 978-3-642-37465-4. Retrieved 2018-04-21. Cite error: Invalid <ref> tag; name "superheavy chemistry" defined multiple times with different content
  4. 4.0 4.1 4.2 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.
  5. Chemical Data. Copernicium - Cn, Royal Chemical Society
  6. Gaston, Nicola; Opahle, Ingo; Gäggeler, Heinz W.; Schwerdtfeger, Peter (2007). "Is eka-mercury (element 112) a group 12 metal?". Angewandte Chemie. 46 (10): 1663–6. doi:10.1002/anie.200604262. Retrieved 5 November 2013.
  7. Chart of Nuclides. Brookhaven National Laboratory

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