Dubnium

Frae Wikipedia
Jump to navigation Jump to search
Dubnium,  105Db
General properties
Mass nummer 268 (most stable isotope)
Dubnium 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 Gowd 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
Ta

Db

(Ups)
rutherfordiumdubniumseaborgium
Atomic nummer (Z) 105
Group group 5
Period period 7
Element category   transition metal
Block d-block
Electron confeeguration [Rn] 5f14 6d3 7s2 (predictit)[1]
Electrons per shell
2, 8, 18, 32, 32, 11, 2 (predictit)
Pheesical properties
Phase (at STP) solit (predictit)[2]
Density (near r.t.) 29.3 g/cm3 (predictit)[1][3]
Atomic properties
Oxidation states 5, (4), (3)[1][3] ​(parenthesized oxidation states are predictions)
Ionisation energies
  • 1st: 664.8 kJ/mol
  • 2nd: 1546.7 kJ/mol
  • 3rd: 2378.4 kJ/mol
  • (more) (aw estimatit)[1]
Atomic radius empirical: 139 pm (estimatit)[1]
Covalent radius 149 pm (estimatit)[4]
Miscellanea
Creestal structurbody-centred cubic (bcc) (predictit)[2]
Body-centered cubic creestal structur for dubnium
CAS Nummer 53850-35-4
History
Namin after the toun o Dubna in Roushie
Diskivery Jynt Institute for Nuclear Research (1968)
Main isotopes o dubnium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
262Db syn 34 s[5][6] 67% α 258Lr
33% SF 263Db syn 27 s[6] 56% SF
41% α 259Lr
3% ε 263mRf
266Db syn 22 min[6] SF
ε 266Rf
267Db syn 1.2 h[6] SF
268Db syn 29 h[6] SF
ε 268Rf
270Db syn 23.15 h[7] SF
| references | in Wikidata

Dubnium is a chemical element wi seembol Db an atomic nummer 105.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 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. 
  2. 2.0 2.1 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. 
  3. 3.0 3.1 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. 
  4. Chemical Data. Dubnium - Db, Royal Chemical Society
  5. Münzenberg, G.; Gupta, M. (2011). "Production and Identification of Transactinide Elements": 877. doi:10.1007/978-1-4419-0720-2_19. 
  6. 6.0 6.1 6.2 6.3 6.4 Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010
  7. 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.