Seaborgium

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Seaborgium
106Sg
W

Sg

(Upo)
dubniumseaborgiumbohrium
Appearance
unknown
General properties
Name, seembol, nummer seaborgium, Sg, 106
Pronunciation Listeni/sˈbɔrɡiəm/
see-BOR-gee-əm
Element category transition metal
Group, period, block 6, 7, d
Staundart atomic wicht [269]
Electron confeeguration [Rn] 5f14 6d4 7s2
(predicted)[1]
2, 8, 18, 32, 32, 12, 2
(predictit)
Electron shells of seaborgium (2, 8, 18, 32, 32, 12, 2 (predictit))
History
Namin after Glenn T. Seaborg
Discovery Lawrence Berkeley National Laboratory (1974)
Physical properties
Phase solid (predictit)[2]
Density (near r.t.) 35.0 (predictit)[1][3] g·cm−3
Atomic properties
Oxidation states 6, 5, 4, 3
(anly boldit oxidation states are kent experimentally)
Ionization energies
(more)
1st: 757.4 (estimatit)[1] kJ·mol−1
2nt: 1732.9 (estimatit)[1] kJ·mol−1
3rd: 2483.5 (estimatit)[1] kJ·mol−1
Atomic radius 132 (predictit)[1] pm
Covalent radius 143 (estimatit)[4] pm
Miscellanea
Crystal structure body-centered cubic (predictit)[2]
Seaborgium has a body-centered cubic crystal structure
CAS registry nummer 54038-81-2
Most stable isotopes
Main article: Isotopes o seaborgium
iso NA hauf-life DM DE (MeV) DP
271Sg syn 1.9 min 67% α 8.54 267Rf
33% SF
269Sg syn 2.1 min α 8.56 265Rf
267Sg syn 1.4 min 17% α 8.20 263Rf
83% SF
265mSg syn 16.2 s α 8.70 261mRf
265Sg syn 8.9 s α 8.90, 8.84, 8.76 261Rf
only isotopes with half-lives over 5 seconds are included here
· r

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