Ununpentium
From Wikinfo
| |||||
| Predicted properties | |||||
|---|---|---|---|---|---|
| Name, Symbol, Number | Ununpentium, Uup, 115 | ||||
| Chemical series | Presumably true metals | ||||
| Group, Period, Block | 15, 7 , p | ||||
| Appearance | Unknown, probably a metallic and silvery white or grey colour | ||||
| Atomic weight | [288] amu (A guess) | ||||
| Electron configuration | [Rn] 5f14 6d10 7s27p3 (A guess based upon bismuth) | ||||
| e- 's per energy level | 2, 8, 18, 32, 32, 18, 5 | ||||
| State of matter | Presumably a solid | ||||
Ununpentium is the temporary name of an unconfirmed synthetic superheavy element in the periodic table that has the temporary symbol Uup and has the atomic number 115.
History
On February 1, 2004, the synthesis of ununpentium and ununtrium were reported in Physical Review C by a team composed of Russian scientists at Dubna (Joint Institute for Nuclear Research), and American scientists at the Lawrence Livermore National Laboratory. Their discovery of the element still awaits confirmation. [1]
The team reported that they bombarded americium (element 95) with calcium (element 20) to produce four atoms of ununpentium (element 115). These atoms, they report, decayed to ununtrium (element 113) in a fraction of a second. The ununtrium produced then existed for 1.2 seconds before decaying into known elements.
The name Ununpentium is used as a placeholder, such as in scientific articles about the search for Element 115; it is a Latinate way of saying "one-one-five-ium" ("ium" being a standard ending for element names). Such transuranic elements are always artificially produced, and usually end up being named for a scientist. See Element naming controversy, systematic element name.
External link
References
- Adapted from the Wikipedia article, "Ununpentium" http://en.wikipedia.org/wiki/Ununpentium, used under the GNU Free Documentation License
