Roentgenium

Frae Wikipedia
Jump to navigation Jump to search
Roentgenium,  111Rg
General properties
Appearance silvery (predictit)[1]
Mass nummer 282 (most stable isotope)
Roentgenium 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
Au

Rg

(Uht)
darmstadtiumroentgeniumcopernicium
Atomic nummer (Z) 111
Group group 11
Period period 7
Element category   unknown chemical properties
Block d-block
Electron confeeguration [Rn] 5f14 6d9 7s2 (predictit)[1][2]
Electrons per shell
2, 8, 18, 32, 32, 17, 2 (predictit)
Pheesical properties
Phase (at STP) solit (predicted)[3]
Density (near r.t.) 28.7 g/cm3 (predictit)[2]
Atomic properties
Oxidation states 5, 3, 1, −1 (predictit)[2][4]
Ionisation energies
  • 1st: 1022.7 kJ/mol
  • 2nd: 2074.4 kJ/mol
  • 3rd: 3077.9 kJ/mol
  • (more) (aw estimatit)[2]
Atomic radius empirical: 138 pm (predictit)[2][4]
Covalent radius 121 pm (estimatit)[5]
Miscellanea
Creestal structurbody-centred cubic (bcc)
Body-centered cubic creestal structur for roentgenium

(predictit)[3]
CAS Nummer 54386-24-2
History
Namin after Wilhelm Röntgen
Diskivery Gesellschaft für Schwerionenforschung (1994)
Main isotopes o roentgenium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
282Rg[6] syn 2.1+1.4
−0.6
 min
α 278Mt
281Rg[7][8] syn 17+6
−3
 s
SF (90%)
α (10%) 277Mt
280Rg syn 3.6 s α 276Mt
279Rg syn 0.17 s α 275Mt
| references | in Wikidata

Roentgenium is a chemical element wi seembol Rg an atomic nummer 111.

References[eedit | eedit soorce]

  1. 1.0 1.1 Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements" (PDF). Journal of Nuclear and Radiochemical Sciences. 5 (2): R19–R25. 
  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. Roentgenium - Rg, Royal Chemical Society
  6. Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr". Physical Review Letters. 112 (17): 172501. doi:10.1103/PhysRevLett.112.172501. 
  7. Oganessian, Yuri Ts.; Abdullin, F. Sh.; Alexander, C.; et al. (2013-05-30). "Experimental studies of the 249Bk + 48Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope 277Mt". Physical Review C. American Physical Society. 87 (054621). Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621. 
  8. Oganessian, Yu. Ts.; et al. (2013). "Experimental studies of the 249Bk + 48Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope 277Mt". Physical Review C. 87 (5): 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.