Seaborgium

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Seaborgium,  106Sg
General properties
Appearance unknown
Mass nummer 269 (most stable isotope)
Seaborgium 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
W

Sg

(Upo)
dubniumseaborgiumbohrium
Atomic nummer (Z) 106
Group group 6
Period period 7
Element category   transition metal
Block d-block
Electron confeeguration [Rn] 5f14 6d4 7s2
(predicted)[1]
Electrons per shell
2, 8, 18, 32, 32, 12, 2
(predictit)
Pheesical properties
Phase (at STP) solit (predictit)[2]
Density (near r.t.) 35.0 (predictit)[1][3] g/cm3
Atomic properties
Oxidation states 6, 5, 4, 3 ​anly boldit oxidation states are kent experimentally
Ionisation energies
Atomic radius empirical: 132 (predictit)[1] pm
Covalent radius 143 (estimatit)[4] pm
Miscellanea
Crestal structur body-centred cubic (bcc) (predictit)[2]
Body-centered cubic creestal structur for seaborgium
CAS Nummer 54038-81-2
History
Diskivery Lawrence Berkeley National Laboratory (1974)
Main isotopes o seaborgium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
271Sg syn 1.9 min 67% α 8.54 267Rf
33% SF
269Sg syn 2.1 min α 265Rf
267Sg syn 1.4 min 17% α 8.20 263Rf
83% SF
265mSg syn 16.2 s α 261mRf
265Sg syn 8.9 s α 261Rf
only isotopes with half-lives over 5 seconds are included here
| references | in Wikidata

Seaborgium is a synthetic element wi the seembol Sg an atomic nummer 106, whose maist stable isotope 271Sg haes a hauf-life o 1.9 minutes. A mair recently discovered isotope 269Sg haes a potentially slichtly langer hauf-life (ca. 2.1 min) based on the observation o a single decay. Chemistry experiments wi seaborgium hae firmly placed it in group 6 as a hivier homologue tae tungsten.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Haire, Richard G. (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. 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. Seaborgium - Sg, Royal Chemical Society