Template:Infobox roentgenium

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Roentgenium,  111Rg
General properties
PronunciationTemplate:Infobox element/pronunciation
Appearancesilvery (predicted)[1]
Standard atomic weight (Ar, standard)Template:Infobox element/standard atomic weight
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope (most stable isotope) (unconfirmed: 286)
Roentgenium in the periodic table
Template:Infobox element/periodic table
Atomic number (Z)111
GroupTemplate:Infobox element/group
Periodperiod 7
Blockd-block
Element categoryTemplate:Infobox element/category format, but probably a transition metal
Electron configuration[Rn] 5f14 6d9 7s2 (predicted)[1][2]
Electrons per shell
2, 8, 18, 32, 32, 17, 2 (predicted)
Physical properties
Phase at STPsolid (predicted)[3]
Density (near r.t.)28.7 g/cm3 (predicted)[2]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
[[Ionization energy|Template:Engvar energies]]
  • 1st: 1020 kJ/mol
  • 2nd: 2070 kJ/mol
  • 3rd: 3080 kJ/mol
  • (more) (all estimated)[2]
Atomic radiusempirical: 138 pm (predicted)[2][4]
Covalent radius121 pm (estimated)[5]
Template:Infobox element/spectral lines
Other properties
Crystal structureTemplate:Infobox element/crystal structure
(predicted)[3]
CAS Number54386-24-2
History
Namingafter Wilhelm Röntgen
DiscoveryGesellschaft für Schwerionenforschung (1994)
Main isotopes of roentgenium
Template:Infobox element/isotopes table
| references

Template:Infobox element/element navigation Template:Template reference list Expression error: Unrecognized word "template".

  1. 1.0 1.1 Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements" (PDF). Journal of Nuclear and Radiochemical Sciences. 5 (2): R19–R25. doi:10.14494/jnrs2000.5.R19.
  2. 2.0 2.1 2.2 2.3 2.4 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. 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.
  4. 4.0 4.1 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.
  5. Chemical Data. Roentgenium - Rg, Royal Chemical Society