Bohrium

Bohrium,  107Bh
General properties
Mass nummer270 (most stable isotope)
Bohrium in the periodic cairt
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseAirnCobaltNickelCapperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSiller (element)CadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGowdMercur (element)ThalliumLeid (element)BismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumUnuntriumFleroviumUnunpentiumLivermoriumUnunseptiumUnunoctium
Re

Bh

(Upe)
seaborgiumbohriumhassium
Atomic nummer (Z)107
Groupgroup 7
Periodperiod 7
Element category  transition metal
Blockd-block
Electron confeeguration[Rn] 5f14 6d5 7s2 (calculated)[1][2]
Electrons per shell
2, 8, 18, 32, 32, 13, 2 (predictit)
Pheesical properties
Phase (at STP)solit (predictit)[3]
Density (near r.t.)37.1 g/cm3 (predictit)[2][4]
Atomic properties
Oxidation states7, (5), (4), (3)[2][4] ​(parenthesized oxidation states are predictions)
Ionisation energies
  • 1st: 742.9 kJ/mol
  • 2nd: 1688.5 kJ/mol
  • 3rd: 2566.5 kJ/mol
  • (more) (aw estimatit)[2]
Atomic radiusempirical: 128 pm (predictit)[2]
Covalent radius141 pm (estimatit)[5]
Miscellanea
Creestal structur ​hexagonal close-packed (hcp)
Hexagonal close-packed creestal structur for bohrium

(predictit)[3]
CAS Nummer54037-14-8
History
Naminafter Niels Bohr
DiskiveryGesellschaft für Schwerionenforschung (1981)
Main isotopes o bohrium
Iso­topeAbun­danceHauf-life (t1/2)Decay modePro­duct
274Bhsyn~54 s[6]αDb
272Bhsyn9.8 sαDb
271Bhsyn1.2 s[7]αDb
270Bhsyn61 sαDb
267Bhsyn17 sαDb
| references | in Wikidata

Bohrium is a chemical element wi seembol Bh an atomic nummer 107.

  • references

References

  1. Johnson, E.; Fricke, B.; Jacob, T.; Dong, C. Z.; Fritzsche, S.; Pershina, V. (2002). "Ionization potentials and radii of neutral and ionized species of elements 107 (bohrium) and 108 (hassium) from extended multiconfiguration Dirac–Fock calculations". The Journal of Chemical Physics. 116: 1862. 2002JChPh.116.1862J. 10.1063/1.1430256. 
  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. Bohrium - Bh, Royal Chemical Society
  6. Oganessian, Yuri Ts.; Abdullin, F. Sh.; Bailey, P. D.; et al. (2010-04-09). "Synthesis of a New Element with Atomic Number Z=117". Physical Review Letters. American Physical Society. 104 (142502). 2010PhRvL.104n2502O. 10.1103/PhysRevLett.104.142502. 20481935.  (gives life-time of 1.3 min based on a single event; conversion to half-life is done by multiplying with ln(2).)
  7. FUSHE (2012). "Synthesis of SH-nuclei" (PDF). Retrieved September 2012.  Check date values in: |accessdate= (help)
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