Bohryo

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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

Ang bohryo (Iningles bohrium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Bh ug kaiphan nga atomik 107. Ang bohryo mao ang puthaw nga transisyon.

Ang mga gi basihan niini[usba | edit source]

  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.


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