From Wikipedia, the free encyclopedia
| 140 |
Ute ← Unquadnilium → Uqu |
Th
↑
Uqn
↓
Uen |
|
|
| General |
| Name, Symbol, Number |
Unquadnilium, Uqn, 140 |
| Chemical series |
Superactinides |
| Group, Period, Block |
3, 8, f |
| Appearance |
? |
| Standard atomic weight |
[372] u (supposition) g·mol−1 |
| Electron configuration |
[Uuo] 5g18 6f2 8s2 |
| Electrons per shell |
2, 8, 18, 32, 50, 20, 8, 2 |
| Physical properties |
| Phase |
presumably solid |
|
| Miscellaneous |
| Selected isotopes |
|
|
| References |
Unquadnilium is an unsynthesized chemical element with atomic number 140 and symbol Uqn.
Should this element exist, it would have an estimated atomic mass of 372 and estimated orbital configuration of [Uuo]5g186f28s2.
[edit] History
The name unquadnilium is used as a placeholder, as in scientific articles about the search for element 140. Transuranic elements (those beyond uranium) are, except for microscopic quantities, always artificially produced, and usually end up being named for a scientist or the location of a laboratory that does work in atomic physics (see systematic element name for more information).
[edit] External links
