SEABORGIUM

introduzione

Numero atomico: 106
Gruppo: 6 or VI B
Peso atomico: 266
Periodo: 7
Numero CAS: 54038-81-2

Classificazione

Metallo
Metalloide
simile a metallo
metallo alcalino
Alkali terroso
Metallo di transizione
calcogeno
alogena
Gas nobile
Lanthanoid
Actinoid
Terre rare
Platinum Metal Group
transuranici
Non ci sono isotopi stabili
Solido
Liquido
Gas
Solido (previsto)

Descrizione • Usi / Funzione

The discovery of Element 106 took place in 1974 almost simultaneously at the Lawrence-Berkeley Laboratory and at the Joint Institute for Nuclear Research at Dubna (near Moscow). The Berkeley Group, under direction of Ghiorso, used the Super-Heavy Ion Linear Accelerator (Super HILAC) as a source of heavy oxygen-18O ions to bombard a 259 microgram target of californium-249. This resulted in the production and positive identification of Element 106-263, which decayed with a half-life of 0.9 ± 0.2 s by the emission of alpha particles. The Dubna Team, directed by Flerov and Organessian, produced heavy ions of chromium-54 with their 310-cm heavy-ion cyclotron to bombard lead-207 and lead-208 and found a product that decayed with a half-life of 7 ms. They assigned Element 106-259 to this isotope. It is now thought six isotopes of Element 106 have been identified. Two of the isotopes are believed to have half-lives of about 30 s. In 1997, IUPAC adopted the name seaborgium for Element 106. 1

Proprietà fisiche

Densità:   g/cm3

* - at 1 atm

configurazione elettronica

configurazione elettronica: [Rn] 7s2 5f14 6d4
Bloccare: d
Più alto livello di energia Occupato: 7
Elettroni di valenza: 

numeri quantici:

n = 6
ℓ = 2
m = 1
ms = +½

bonding

isotopi

nuclide Massa 2 Metà vita 2 spin nucleare 2 Energia di legame
258Sg 258.11317(45)# 3.3(10) ms [2.9(+13-7) ms] 0+ 1,897.00 MeV
259Sg 259.11450(19)# 580(210) ms [0.48(+28-13) s] 1/2+# 1,905.08 MeV
260Sg 260.11442(4) 3.8(8) ms 0+ 1,913.15 MeV
261Sg 261.11612(14)# 230(60) ms 7/2+# 1,921.22 MeV
262Sg 262.1164(3)# 8(3) ms [6.9(+38-18) ms] 0+ 1,929.29 MeV
263Sg 263.11832(13)# 1.0(2) s 9/2+# 1,937.36 MeV
264Sg 264.11893(30)# 0.4# s 0+ 1,945.43 MeV
265Sg 265.12111(6) 8(3) s 3/2+# 1,944.19 MeV
266Sg 266.12207(31)# 21(6) s 0+ 1,952.26 MeV
267Sg 267.12443(29)# 19 ms 1,960.33 MeV
268Sg 268.12561(58)# 30# s 0+ 1,968.40 MeV
269Sg 269.12876(70)# 35(23) s 1,976.47 MeV
270Sg 270.13033(66)# 10# min 0+ 1,975.23 MeV
271Sg 271.13347(70)# 2.4(+43-10) min 1,983.30 MeV
272Sg 272.13516(82)# 1# h 0+ 1,991.37 MeV
273Sg 273.13822(71)# 1# min 1,999.44 MeV
I valori assegnati # non sono puramente derivati ​​da dati sperimentali, ma almeno parzialmente da tendenze sistematiche. Gira con argomenti di assegnazione deboli sono racchiusi tra parentesi. 2

Abbondanza

Informazioni sulla sicurezza


Scheda di sicurezza - ACI Alloys, Inc.

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Link esterno:

fonti

(1) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4:28.
(2) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; pp 6:123-6:137.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; pp 6:107-6:122.
(4) - Atomic Mass Data Center. http://amdc.in2p3.fr/web/nubase_en.html (accessed July 14, 2009).