| Atomic Mass | 294 |
|---|---|
| Electron Configuration | [Rn] 7s2 7p6 5f14 6d10(predicted) |
| Oxidation States | Expected to be a Gas |
| Year Discovered | 2006 |
| Atomic Mass | 294 |
|---|---|
| Electron Configuration | [Rn] 7s2 7p6 5f14 6d10(predicted) |
| Oxidation States | Expected to be a Gas |
| Year Discovered | 2006 |
| Element Name | Oganesson |
|---|---|
| Element Symbol | Og |
| InChI | InChI=1S/Og |
| InChIKey | GOANEQIZDYDFCO-UHFFFAOYSA-N |
| Atomic Weight |
294 294 Relative Mass: 294.21392(71#) |
|---|---|
| Electron Configuration |
[Rn] 7s2 7p6 5f14 6d10(predicted) |
| Oxidation States |
-1, 0, +1,+2,+4, +6 (predicted) |
| Physical Description |
Expected to be a Gas |
| Element Classification |
Non-metal |
| Element Period Number |
7 |
| Element Group Number |
18 - Noble Gas |
| Boiling Point |
350±30K(80±30°C,170±50°F)(extrapolated) |
| Estimated Crustal Abundance |
Not Applicable |
| Estimated Oceanic Abundance |
Not Applicable |
On October 16, 2006, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of oganesson. They produced oganesson by bombarding atoms of californium-249 with ions of calcium-48. This produced oganesson-294, an isotope with a half-life of about 0.89 milliseconds (0.00089 seconds), and three free neutrons. The californium target was irradiated with a total of 1.6*1019 calcium ions over the course of 1080 hours, resulting in the production of three atoms of oganesson. Oganesson's most stable isotope, oganesson-294, has a half-life of about 0.89 milliseconds. It decays into livermorium-290 through alpha decay.
On Novemer 28th, 2016, element 118 was named Oganesson with the symbol (Og). The name was proposed by the Joint Institute for Nuclear Research, Dubna (Russia) and Lawrence Livermore National Laboratory (USA). It honors Professor Yuri Oganessian (born 1933) for his pioneering contributions to transactinoid elements research.
Oganesson does not occur naturally in the Earth’s crust. The name oganesson and symbol Og are the accepted ones for element 118. The name is in line with the tradition of honoring a scientist and recognizes Prof. Yuri Oganessian (Fig. IUPAC.118.1; born 1933) for his pioneering contribution to trans-actinoid element research. His many achievements include the discovery of super-heavy elements and significant advances in the nuclear physics of super-heavy nuclei, including experimental evidence for the “island of stability.”
In 2005, experiments were performed in Dubna’s U-400 cyclotron, where 48Ca bombarded a spinning target of 249Cf at nearly 3×104 km/s to produce oganesson. With the success of creating oganesson, scientists from Livermore and Joint Institute for Nuclear Research (JINR) are starting experiments to create element 120 by bombarding a 244Pu target with a beam of 58Fe [680], [681], [682], [683]. Oganesson has no known isotopic applications aside from scientific research.
![Fig. IUPAC.118.1: Prof. Yuri Oganessian after whom element 118 was named. (Image Source: Texas A&M University Institute for Advanced Study) [684].](https://pubchem.ncbi.nlm.nih.gov/images/iupac/j_pac-2015-0703_fig_156.jpg)
Since only a few atoms of oganesson have ever been produced, it currently has no uses outside of basic scientific research.
See more information at the Oganesson compound page.
| Stable Isotope Count | 0 |
|---|
| Nuclide | Atomic Mass and Uncertainty [u] | Half Life and Uncertainty | Discovery Year | Decay Modes, Intensities and Uncertainties [%] |
|---|---|---|---|---|
| 293Og | 293.213423 ± 0.000761 [Estimated] | 1 ms [Estimated] | 2010 | α ? |
| 294Og | 294.213979 ± 0.000594 [Estimated] | 0.7 ms ± 0.3 | 2004 | α≈100%; SF ? |
| 295Og | 295.216178 ± 0.000703 [Estimated] | 680 ms ± 540 | 2006 | α≈100% |
