DARMSTADTIUM

introduzione

Numero atomico: 110
Gruppo: 10 or VIII B
Peso atomico: 281
Periodo: 7
Numero CAS: 54083-77-1

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

In 1987 Oganessian, et al., at Dubna, claimed discovery of this element. Their experiments indicated the spontaneous fissioning nuclide Element 110-272 with a half-life of 10 ms. More recently a group led by Armbruster at G.S.I. in Darmstadt, Germany, reported evidence of Element 110-269, which was produced by bombarding lead for many days with more than 10^18 nickel atoms. A detector searched each collision for Element 110’s distinct decay sequence. On November 9, 1994, evidence of 110 was detected. Berkeley scientists, in 1991, performed similar experiments and reported evidence of 110, but this was not confirmed. Workers at Dubna have experiments underway to produce Element 110-273 by bombarding plutonium with sulfur atoms. Other experiments at G.S.I. are now searching for heavier isotopes. Several years ago the IUPAC suggested the use of the temporary name ununnilium for Element 110 when it was found. 1

Proprietà fisiche

Densità:   g/cm3

* - at 1 atm

configurazione elettronica

configurazione elettronica: [Rn] 7s2 5f14 6d8
Bloccare: d
Più alto livello di energia Occupato: 7
Elettroni di valenza: 

numeri quantici:

n = 6
ℓ = 2
m = 0
ms = -½

bonding

isotopi

nuclide Massa 2 Metà vita 2 spin nucleare 2 Energia di legame
267Ds 267.14434(39)# 3(+6-2) μs 9/2+# 1,938.57 MeV
268Ds 268.14380(54)# 100# μs 0+ 1,946.64 MeV
269Ds 269.14512(15)# 230(110) μs [179(+245-66) μs] 3/2+# 1,954.71 MeV
270Ds 270.14472(31)# 160(100) μs [0.10(+14-4) ms] 0+ 1,962.79 MeV
271Ds 271.14606(11)# 210(170) ms 11/2-# 1,970.86 MeV
272Ds 272.14632(70)# 1# s 0+ 1,978.93 MeV
273Ds 273.14886(14)# 0.17(+17-6) ms 13/2-# 1,987.00 MeV
274Ds 274.14949(53)# 2# s 0+ 1,995.07 MeV
275Ds 275.15218(48)# 2# s 1,993.83 MeV
276Ds 276.15303(65)# 5# s 0+ 2,001.90 MeV
277Ds 277.15565(104)# 5# s 11/2+# 2,009.97 MeV
278Ds 278.15647(73)# 10# s 0+ 2,018.04 MeV
279Ds 279.15886(80)# 0.18(+5-3) s 2,026.11 MeV
280Ds 280.15980(91)# 11(6) s 0+ 2,034.18 MeV
281Ds 281.16206(78)# 9.6 s 3/2+# 2,032.94 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.

Per maggiori informazioni

Link esterno:

fonti

(1) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4:11.
(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).