DARMSTADTIUM

Introducción

Número atómico: 110
Grupo: 10 or VIII B
Peso atomico: 281
Período: 7
Número CAS: 54083-77-1

Clasificación

chalcogen
halógeno
Gas noble
Lantanoides
Actinoides
Elemento de tierras raras
Platino Metal Group
transuranium
No hay isótopos estables
Sólido
Líquido
Gas
Sólido (Predicho)

Descripción • Usos / Función

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

Propiedades físicas

Densidad:   g/cm3

* - at 1 atm

Configuración electronica

Configuración electronica: [Rn] 7s2 5f14 6d8
Bloquear: d
Ocupado más alto nivel de energía: 7
Electrones de valencia: 

Números cuánticos:

n = 6
ℓ = 2
m = 0
ms = -½

Vinculación

isótopos

nucleido Masa 2 Media vida 2 spin nuclear 2 Energía de unión
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
Los valores marcados con # no son puramente derivan de los datos experimentales, pero al menos en parte, de las tendencias sistemáticas. Hace girar con débiles argumentos de asignación se incluyen entre paréntesis. 2

Abundancia

Información de seguridad


Ficha de datos de seguridad de materiales - ACI Alloys, Inc.

Para más información

Enlaces externos:

Fuentes

(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).