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

Roentgenium, 111Rg
Roentgenium
Pronunciation
Appearancesilvery (predictit)[1]
Mass number[282]
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
Groupgroup 11
Periodperiod 7
Blockd-block
Element category  Unkent chemical properties
Electron confeeguration[Rn] 5f14 6d9 7s2 (predictit)[1][2]
Electrons per shell2, 8, 18, 32, 32, 17, 2 (predictit)
Pheesical properties
Phase at STPsolit (predicted)[3]
Density (near r.t.)28.7 g/cm3 (predictit)[2]
Atomic properties
Oxidation states(−1), (+1), (+3), (+5), (+7) (predicted)[2][4][5]
Ionisation energies
  • 1st: 1022.7 kJ/mol
  • 2nd: 2074.4 kJ/mol
  • 3rd: 3077.9 kJ/mol
  • (more) (aw estimatit)[2]
Atomic radiusempirical: 138 pm (predictit)[2][4]
Covalent radius121 pm (estimatit)[6]
Ither properties
Naitural occurrencesynthetic
Creestal structurbody-centred cubic (bcc)
Body-centered cubic creestal structur for roentgenium

(predictit)[3]
CAS Nummer54386-24-2
History
Naminafter Wilhelm Röntgen
DiskiveryGesellschaft für Schwerionenforschung (1994)
Main isotopes o roentgenium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
282Rg[7] syn 2.1+1.4
−0.6
 min
α 278Mt
281Rg[8][9] 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

ReferencesEedit

  1. 1.0 1.1 1.2 Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements" (PDF). Journal of Nuclear and Radiochemical Sciences. 5 (2): R19–R25. doi:10.14494/jnrs2000.5.R19. Cite error: Invalid <ref> tag; name "e-conf" defined multiple times wi different content
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 978-1-4020-3555-5. Cite error: Invalid <ref> tag; name "Haire" defined multiple times wi different content
  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 4.2 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. Conradie, Jeanet; Ghosh, Abhik (15 June 2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry. 2019 (58): 8735–8738. doi:10.1021/acs.inorgchem.9b01139.
  6. Chemical Data. Roentgenium - Rg, Royal Chemical Society
  7. 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.
  8. 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.
  9. 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.