Plantilya:Infobox bohrium

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Bohrium
107Bh
Re

Bh

(Upe)
seaborgiumbohriumhassium
Appearance
unknown
General properties
Name, simbolo, kaiphan bohrium, Bh, 107
Pronunciation Plantilya:IPAc-en
Element category puthaw nga transisyon
Group, period, block 77, d
Standard atomic weight [270]
Electron configuration [Rn] 5f14 6d5 7s2
(calculated)[1][2]
2, 8, 18, 32, 32, 13, 2
(predicted)
Electron shells of bohrium (2, 8, 18, 32, 32, 13, 2 (predicted))
History
Discovery Gesellschaft für Schwerionenforschung (1981)
Physical properties
Phase magahi (predicted)
Density (near r.t.) 37 (predicted)[2] g·cm−3
Atomic properties
Oxidation states 7, 5, 4, 3 (predicted)[2]
(only bolded oxidation states are known experimentally)
Ionization energies
(more)
1st: 742.9 (estimated)[2] kJ·mol−1
2nd: 1688.5 (estimated)[2] kJ·mol−1
3rd: 2566.5 (estimated)[2] kJ·mol−1
Atomic radius 128 (predicted)[2] pm
Covalent radius 141 (estimated)[3] pm
Miscellanea
CAS registry number 54037-14-8
Most stable isotopes
Main article: Isotopes of bohrium
iso NA half-life DM DE (MeV) DP
274Bh syn ~54 s[4] α 8.8 270Db
272Bh syn 9.8 s α 9.02 268Db
271Bh syn 1.2 s[5] α 9.35[5] 267Db
270Bh syn 61 s α 8.93 266Db
267Bh syn 17 s α 8.83 263Db
only isotopes with half-lives over 1 second are included here
t  h  u
· r

Plantilya:Template reference list

  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. doi:10.1063/1.1430256. Bibcode2002JChPh.116.1862J. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Haire, Richard G. (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. Chemical Data. Bohrium - Bh, Royal Chemical Society
  4. Oganessian, Yu. Ts.; Abdullin, F. Sh.; Bailey, P. D.; Benker, D. E.; Bennett, M. E.; Dmitriev, S. N.; Ezold, J. G.; Hamilton, J. H.; et al. (2010). "Synthesis of a New Element with Atomic Number Z=117". Physical Review Letters 104. doi:10.1103/PhysRevLett.104.142502. PMID 20481935. Bibcode2010PhRvL.104n2502O.  (gives life-time of 1.3 min based on a single event; conversion to half-life is done by multiplying with ln(2).)
  5. 5.0 5.1 FUSHE (2012). Synthesis of SH-nuclei. Retrieved on September 2012.