Roentgenium

Roentgenium,  111Rg
General properties
Appearancesilvery (predictit)[1]
Mass nummer282 (most stable isotope)
Roentgenium in the periodic cairt
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseAirnCobaltNickelCapperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSiller (element)CadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGowdMercur (element)ThalliumLeid (element)BismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumUnuntriumFleroviumUnunpentiumLivermoriumUnunseptiumUnunoctium
Au

Rg

(Uht)
darmstadtiumroentgeniumcopernicium
Atomic nummer (Z)111
Groupgroup 11
Periodperiod 7
Element category  unknown chemical properties
Blockd-block
Electron confeeguration[Rn] 5f14 6d9 7s2 (predictit)[1][2]
Electrons per shell
2, 8, 18, 32, 32, 17, 2 (predictit)
Pheesical properties
Phase (at STP)solit (predicted)[3]
Density (near r.t.)28.7 g/cm3 (predictit)[2]
Atomic properties
Oxidation states5, 3, 1, −1 (predictit)[2][4]
Ionisation energies
  • 1st: 1022.7 kJ/mol
  • 2nd: 2074.4 kJ/mol
  • 3rd: 3077.9 kJ/mol
  • (more) (aw estimatit)[2]
Atomic radiusempirical: 138 pm (predictit)[2][4]
Covalent radius121 pm (estimatit)[5]
Miscellanea
Creestal structur ​body-centred cubic (bcc)
Body-centered cubic creestal structur for roentgenium

(predictit)[3]
CAS Nummer54386-24-2
History
Naminafter Wilhelm Röntgen
DiskiveryGesellschaft für Schwerionenforschung (1994)
Main isotopes o roentgenium
Iso­topeAbun­danceHauf-life (t1/2)Decay modePro­duct
282Rg[6]syn2.1+1.4
−0.6
 min
αMt
281Rg[7][8]syn17+6
−3
 s
SF (90%)
α (10%)Mt
280Rgsyn3.6 sαMt
279Rgsyn0.17 sαMt
| references | in Wikidata

Roentgenium is a chemical element wi seembol Rg an atomic nummer 111.

  • references

References

  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. 
  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. 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). 2011PhRvB..84k3104O. 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. 10.1007/BFb0116498. Retrieved 4 October 2013. 
  5. Chemical Data. Roentgenium - Rg, Royal Chemical Society
  6. Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr". Physical Review Letters. 112 (17): 172501. 10.1103/PhysRevLett.112.172501. 
  7. Oganessian, Yuri Ts.; Abdullin, F. Sh.; Alexander, C.; et al. (2013-05-30). "Experimental studies of the 249Bk + 48Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope 277Mt". Physical Review C. American Physical Society. 87 (054621). 2013PhRvC..87e4621O. 10.1103/PhysRevC.87.054621. 
  8. Oganessian, Yu. Ts.; et al. (2013). "Experimental studies of the 249Bk + 48Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope 277Mt". Physical Review C. 87 (5): 054621. 2013PhRvC..87e4621O. 10.1103/PhysRevC.87.054621. 
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