Ununbium



112 ununtrium
Hg
↑
Uub
↓
(Uhb)
General
Number ununbium, Uub, 112
transition metals
Block d
Appearance unknown, probably silvery
white or metallic gray
liquid or colorless gas
Standard atomic weight (288)  g·mol−1
mercury)
shell 2, 8, 18, 32, 32, 18, 2
Phase unknown; possibly gas
CAS registry number 54084-26-3
Selected isotopes
Main article: Isotopes of ununbium
iso NA half-life DM DE (MeV) DP
283Uub syn
References

Ununbium (noble gas than to mercury.[1][2]

Ununbium was lead-208 nucleus by accelerating zinc nuclei into a lead target in a heavy ion accelerator. The two ununbium nuclei so produced had a mass number of 277.[3]

The element was synthesized in 2000 and 2004 in the Joint Institute for Nuclear Research, Russia.

In May 2006 in the JINR synthesis of this element was confirmed by another method. The isotope 282Uub was identified as a final product of this series of alpha decays:

\,^{294}_{118}\mathrm{Uuo} \to \,^{290}_{116}\mathrm{Uuh} \to \,^{286}_{114}\mathrm{Uuq} \to \,^{282}_{112}\mathrm{Uub}

It was found that the final nucleus undergoes spontaneous fission.[4] Spontaneous fission products are much smaller and irregular.


See also

References

  1. ^ a b Indication for a gaseous element 112.
  2. ^ "Chemistry of Hassium". Gesellschaft für Schwerionenforschung mbH (2002). Retrieved on 2007-01-31.
  3. ^ S. Hofmann, V. Ninov, F. P. Heßberger, P. Armbruster, H. Folger, G. Münzenberg, H.J. Schött, A.G. Popeko, A.V. Yeremin, S. Saro, R. Janik, M. Leino. The new element 112. SpringerLink. Retrieved on 2007-07-03.
  4. ^ Oganessian, Yu. Ts.; Utyonkov, V.K.; Lobanov, Yu.V.; Abdullin, F.Sh.; Polyakov, A.N.; Sagaidak, R.N.; Shirokovsky, I.V.; Tsyganov, Yu.S.; Voinov, Yu.S.; Gulbekian, G.G.; Bogomolov, S.L.; B. N. Gikal, A. N. Mezentsev, S. Iliev; Subbotin, V.G.; Sukhov, A.M.; Subotic, K; Zagrebaev, V.I.; Vostokin, G.K.; Itkis, M. G.; Moody, K.J; Patin, J.B.; Shaughnessy, D.A.; Stoyer, M.A.; Stoyer, N.J.; Wilk, P.A.; Kenneally, J.M.; Landrum, J.H.; Wild, J.H.; and Lougheed, R.W. (2006-10-09). "Synthesis of the isotopes of elements 118 and 116 in the 249Cf and 245Cm+48Ca fusion reactions". Physical Review C 74 (4): 044602. doi:10.1103/PhysRevC.74.044602. Retrieved on 2006-10-16.
 
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