Unununium (original) (raw)
| Darmstadtium - Unununium - Ununbium AuUuu Full table | |
|---|---|
| Known properties | |
| Name, Symbol, Number | Unununium, Uuu, 111 |
| Chemical series | Transition metals |
| Group, Period, Block | 11, 7 , d |
| Appearance | unknown; probably metallic, silvery white or gray |
| Atomic weight | [272] amu |
| Electron configuration | probably [Rn]55f14 6d10 7s1 |
| e- 's per energy level | 2, 8, 18, 32, 32, 18, 1 |
| State of matter | Presumably a solid |
Unununium is a chemical element in the periodic table that has the symbol Uuu and atomic number 111. It has an atomic weight of 272 making it one of the super-heavy atoms. It is a synthetic element whose only known isotope has a half-life of around 15 ms before it decays into meitnerium. Due to its presence in Group 11 it is a transition metal and so probably metallic and solid.
History
It was first created at the Gesellschaft f�r Schwerionenforschung (GSI) in Darmstadt, Germany on December 8, 1994. Only three atoms of it have been created (all Uuu-272), by the fusion of bismuth-209 and nickel-64 in a linear accelerator (nickel was bombarded onto the target).
It is named Unununium, as in 1-1-1-ium, a temporary IUPAC systematic element name. There is an ongoing element naming controversy over what this element should be called.