118
Og
294
Oganesson
Noble Gas
Group 18
Period 7
Block p
Oganesson is a chemical element of the periodic table with chemical symbol Og and atomic number 118 with an atomic weight of 294 u and is classed as noble gas and is part of group 18 (noble gases). Oganesson is solid at room temperature.
Oganesson in the periodic table
| Symbol | Og |
| Atomic number | 118 |
| Group | 18 (Noble gases) |
| Period | 7 |
| Block | p |
| Classification | Noble Gas |
| Appearance | - |
| Color | - |
| Number of protons | 118 p+ |
| Number of neutrons | 176 n0 |
| Number of electrons | 118 e- |
From Wikipedia, the free encyclopediaOganesson is IUPAC's name for the transactinide element with the atomic number 118 and element symbol Og. It is also known as eka-radon or element 118, and on the periodic table of the elements it is a p-block element and the last one of the 7th period. Oganesson is currently the only synthetic member of group 18.
Physical properties
| Phase at STP | Solid |
| Density | 4.95 g/cm3 |
| Atomic weight | 294 u |
Thermal properties
| Melting point | - |
| Boiling point | 350 K 76.85 °C 170.33 °F |
| Heat of vaporization | - |
Atomic properties
| Electronegativity (Pauling Scale) | - |
| Electron affinity | 5.40318 kJ/mol |
| Oxidation states | −1), (0), (+1), (+2), (+4), (+6) (predicted) |
| Ionization energies |
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Electron configuration for oganesson
Electron configuration Shorthand configuration | [Rn] 5f14 6d10 7s2 7p6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Full configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Electron configuration chart |
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| Electrons per shell | 2, 8, 18, 32, 32, 18, 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valence electrons | 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valency electrons | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Bohr model | Figure: Shell diagram of Oganesson (Og) atom. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Orbital Diagram
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The history of Oganesson
| Discovery | Joint Institute for Nuclear Research, Lawrence Livermore National Laboratory (2002) |
| Named by | JINR, LLNL |
Discovery of oganesson It was first synthesized in 2002 at the Joint Institute for Nuclear Research (JINR) in Dubna, near Moscow, Russia, by a joint team of Russian and American scientists. In December 2015, it was recognized as one of four new elements by the Joint Working Party of the international scientific bodies IUPAC and IUPAP. It was formally named on 28 November 2016.[14][15] The name honors the nuclear physicist Yuri Oganessian, who played a leading role in the discovery of the heaviest elements in the periodic table. It is one of only two elements named after a person who was alive at the time of naming, the other being seaborgium, and the only element whose eponym is alive today. | |
| Original word | Oganessian |
| Language of origin | English |
| Name source | Person |
| Meaning | “Yuri Oganessian” |
Naming The element is named in honour of Yuri Oganessian, the Armenian-Russian physicist who led much of the recent transactinide research at JINR. | |
Identifiers
List of unique identifiers for Oganesson in various chemical registry databases| CAS Number | 54144-19-3 |
| ChemSpider ID | - |
| EC number | - |
| PubChem CID Number | - |