Ununennium

Ununennium is not yet proven chemical element with atomic number 119, it is also known as eka- francium.

In the extended periodic table it is among the Transactinoiden ( in "normal" periodic table it is not shown). The name is preliminary in nature and represents the three digits of the order number. Furthermore, the hitherto unexplored 8 period starts with him.

Occurrence

The element does not exist in nature, it could only be produced in the future by nuclear fusion.

Unsuccessful attempts at synthesis

Early as 1985, was tried in vain at the linear accelerator superHILAC in Berkeley to generate Ununennium by bombarding einsteinium -254 with calcium -48 ions.

It is unlikely that this reaction will be successful, because it is very difficult to prepare a sufficient amount of the einsteinium targets.

Target - projectile combinations for nuclei with Z = 119

The following table shows various combinations of targets and projectiles that can be used for the production of nuclei with a charge number of 119.

Predicting the decay characteristics

The alpha -decay half-lives of 1700 isotopes with the charge number between 100 and 130 have been predicted on the basis of model calculations. The case found half-lives for 291- 307Uue amount to a few microseconds. The longest half-life of nearly half a millisecond should have the isotope 294Uue.