DARMSTADTIUM

Inleiding

atoomgetal: 110
groep: 10 or VIII B
atoomgewig: 281
tydperk: 7
CAS nommer: 54083-77-1

klassifikasie

Metal
metaal
metaalagtige
alkalimetaal
Alkali aard metaal
oorgangsmetaal
Chalcogen
halogeen
edelgas
Lanthanoid
Actinoid
Rare Earth Element
Platinumgroepmetaalverwante
transuraan
Geen stabiele isotope
Solied
Liquid
gas
Solied (voorspel)

beskrywing • Gebruike / Function

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

Fisiese eienskappe

digtheid:   g/cm3

* - at 1 atm

elektronkonfigurasie

elektronkonfigurasie: [Rn] 7s2 5f14 6d8
Blok: d
Hoogste Besig energievlak: 7
valenselektrone: 

kwantumgetalle:

n = 6
ℓ = 2
m = 0
ms = -½

binding

isotope

nuklied Mis 2 Halflewe 2 kern Spin 2 bindingsenergie
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
Waardes gemerk # is nie suiwer afgelei van eksperimentele data, maar ten minste gedeeltelik uit sistematiese tendense. Draai met 'n swak werkstuk argumente is ingesluit in hakies. 2

oorvloed

veiligheid inligting

Vir meer inligting

eksterne skakel:

Bronne

(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).