Bohrium

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Bohrium,  107Bh
General properties
Mass nummer 270 (most stable isotope)
Bohrium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Re

Bh

(Upe)
seaborgiumbohriumhassium
Atomic nummer (Z) 107
Group group 7
Period period 7
Block d-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 states 7, (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 radius empirical: 128 pm (predictit)[2]
Covalent radius 141 pm (estimatit)[5]
Miscellanea
Crestal structur hexagonal close-packed (hcp)
Hexagonal close-packed creestal structur for bohrium

(predictit)[3]
CAS Nummer 54037-14-8
History
Namin after Niels Bohr
Diskivery Gesellschaft für Schwerionenforschung (1981)
Main isotopes o bohrium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
274Bh syn ~54 s[6] α 270Db
272Bh syn 9.8 s α 268Db
271Bh syn 1.2 s[7] α 267Db
270Bh syn 61 s α 266Db
267Bh syn 17 s α 263Db
| references | in Wikidata

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

References[eedit | eedit soorce]

  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. Bibcode:2002JChPh.116.1862J. doi: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). 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. 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). Bibcode:2010PhRvL.104n2502O. doi:10.1103/PhysRevLett.104.142502. PMID 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: |access-date= (help)