Oganesson

(Reguidit frae Ununoctium)

Oganesson is a superhivy airtifeecial chemical element wi an atomic nummer o 118 an a seembol o Og.

Oganesson, 118Og
Oganesson
Pronunciation/ˌɡəˈnɛsən/ (OH-gə-NES-ən[1])
Alternative nameselement 118, eka-radon
Mass number[294]
Oganesson 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
Rn

Og

(Usb)
tennessineoganessonununennium
Atomic nummer (Z)118
Groupgroup 18
Periodperiod 7
Blockp-block
Element category  Unkent chemical properties
Electron confeeguration[Rn] 5f14 6d10 7s2 7p6 (predictit)[2][3]
Electrons per shell2, 8, 18, 32, 32, 18, 8 (predictit)
Pheesical properties
Phase at STPsolit (predicted)[2]
Bylin pynt350±30 K ​(80±30 °C, ​170±50 °F) (extrapolatit)[2]
Density when liquid (at m.p.)4.9–5.1 g/cm3 (predictit)[4]
Creetical pynt439 K, 6.8 MPa (extrapolatit)[5]
Heat o fusion23.5 kJ/mol (extrapolatit)[5]
Heat o vapourisation19.4 kJ/mol (extrapolatit)[5]
Atomic properties
Oxidation states(−1),[3] (0), (+1),[6] (+2),[7] (+4),[7] (+6)[3] (predicted)
Ionisation energies
  • 1st: 839.4 kJ/mol (predictit)[3]
  • 2nd: 1563.1 kJ/mol (predictit)[8]
Covalent radius157 pm (predictit)[9]
Ither properties
Naitural occurrencesynthetic
CAS Nummer54144-19-3[10]
History
NaminIUPAC seestematic element name
DiskiveryJynt Institute for Nuclear Research an Lawrence Livermore Naitional Laboratory (2002)
Main isotopes o oganesson
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
294Og[11] syn ~0.89 ms α 290Lv
SF
| references

It wis recognised bi the International Union of Pure and Applied Chemistry in Januar 2016. It is cried efter Yuri Oganessian, a Russian physicist that wis ahint the discovery o flerovium.[12]

References

eedit
  1. Ritter, Malcolm (9 Juin 2016). "Periodic table elements named for Moscow, Japan, Tennessee". Associated Press. Retrieved 19 December 2017.
  2. Jump up to: a b c d Nash, Clinton S. (2005). "Atomic and Molecular Properties of Elements 112, 114, and 118". Journal of Physical Chemistry A. 109 (15): 3493–3500. Bibcode:2005JPCA..109.3493N. doi:10.1021/jp050736o. PMID 16833687. Cite error: Invalid <ref> tag; name "Nash2005" defined multiple times wi different content
  3. Jump up to: a b c d e f g 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
  4. Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the Properties of the 113–120 Transactinide Elements". Journal of Physical Chemistry. American Chemical Society. 85 (9): 1177–1186. doi:10.1021/j150609a021.
  5. Jump up to: a b c Eichler, R.; Eichler, B., Thermochemical Properties of the Elements Rn, 112, 114, and 118 (PDF), Paul Scherrer Institut, retrieved 23 October 2010
  6. Jump up to: a b Han, Young-Kyu; Bae, Cheolbeom; Son, Sang-Kil; Lee, Yoon Sup (2000). "Spin–orbit effects on the transactinide p-block element monohydrides MH (M=element 113–118)". Journal of Chemical Physics. 112 (6): 2684. Bibcode:2000JChPh.112.2684H. doi:10.1063/1.480842.
  7. Jump up to: a b c d Kaldor, Uzi; Wilson, Stephen (2003). Theoretical Chemistry and Physics of Heavy and Superheavy Elements. Springer. p. 105. ISBN 978-1402013713. Retrieved 18 Januar 2008. Cite error: Invalid <ref> tag; name "Kaldor" defined multiple times wi different content
  8. 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.
  9. Chemical Data. Ununoctium - Uuo, Royal Chemical Society
  10. "Ununoctium". WebElements Periodic Table. Retrieved 9 December 2007.
  11. Oganessian, Yu. Ts.; Utyonkov, V. K.; Lobanov, Yu. V.; Abdullin, F. Sh.; Polyakov, A. N.; Sagaidak, R. N.; Shirokovsky, I. V.; Tsyganov, Yu. S.; et al. (9 October 2006). "Synthesis of the isotopes of elements 118 and 116 in the 249Cf and 245Cm+48Ca fusion reactions". Physical Review C. 74 (4): 044602. Bibcode:2006PhRvC..74d4602O. doi:10.1103/PhysRevC.74.044602. Retrieved 18 Januar 2008. Cite uses deprecated parameter |displayauthors= (help)
  12. Aron, Jacob (8 Juin 2016). "Four new element names to be added to the periodic table". New Scientist. Retrieved 6 September 2023.