Roentgenium
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| General Properties | ||||||||
|---|---|---|---|---|---|---|---|---|
| Atomic number | Predicted atomic mass | Half-life of longest living isotope | Electron Configuration | First developed | ||||
| 111 | 280amu | Around 2 minutes | [Rn] 5f14 6d10 7s1 | 1994 | ||||
| General Properties | |
|---|---|
| Atomic number | 111 |
| Atomic mass | 280amu |
| Half-life of longest living isotope | Around 2 minutes |
| Electron Configuration | [Rn] 5f14 6d9 7s2 |
| First discovered | 1994 |
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Description and uses
Roentgenium is the 111th element of the periodic table. It was discovered in 1994 by a research team led by Peter Armbruster and Gottfried Münzenberg. Its longest
living isotope is 282Rg, with a half life of around 2 minutes.