Unbiennium
| properties | |
|---|---|
| Properties (if known) | |
| Name , symbol , atomic number | Unbiennium, Ube, 129 |
| Element category | Superactinoids |
| Group , period , block | g9 , 8 , g |
| CAS number | 63309-51-3 |
| Atomic | |
| Atomic mass | (calculated) 342 u |
| Electron configuration | [ Og ] 5g 4 6f 3 8s 2 8p 2 (?) |
| Electrons per energy level | 2, 8, 18, 32, 41, 18, 8, 2 |
| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Values that are particularly questionable are marked with (?) | |
Unbiennium is the chemical element with the atomic number 129 that has not yet been proven. Since there are no natural isotopes of this element , it would have to be produced (synthesized) in an artificial way by nuclear fusion . The name is preliminary and is derived from the ordinal number. Unbiennium is possibly the ninth element that has a g orbital and, in its ground state, probably has the electronic configuration [ Og ] 8s 2 8p 2 6f 3 5g 4 . In the extended periodic table it belongs to the transactinoids ( it is not shown in the "normal" periodic table ).
Web links
Individual evidence
- ^ Koichiro Umemoto, Susumu Saito: Electronic Configurations of Superheavy Elements. In: J. Phys. Soc. Jpn. 1996, 65, pp. 3175-3179, doi : 10.1143 / JPSJ.65.3175 .