Introducing Oganesson: The Superheavy Element 118
Oganesson (symbol: Og) represents the frontier of the periodic table as a synthetic chemical element. It does not occur naturally anywhere on Earth. Possessing an atomic number of 118, Oganesson is currently the element with the highest atomic number identified, making it a “superheavy” element. Its position in Group 18 of the periodic table places it directly below radon, theoretically classifying it as a noble gas. However, due to its immense atomic weight and relativistic effects, its chemical properties are predicted to be significantly different from other noble gases, possibly exhibiting metallic characteristics or even being a condensed state at room temperature, rather than a gas. Its extreme instability means that its physical and chemical properties cannot be directly observed.
The Journey to Discovery
The synthesis of Oganesson was a collaborative achievement involving scientists from the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, and the Lawrence Livermore National Laboratory (LLNL) in California, United States. The initial report of its creation was announced in 2006. The process involved bombarding target atoms of Californium-249 with accelerated ions of Calcium-48. This highly specialized reaction occurred within particle accelerators, leading to the brief formation of Oganesson atoms before they rapidly decayed into lighter elements. Only a very small number of atoms have ever been successfully created.
Naming Oganesson
The name “Oganesson” was officially approved by the International Union of Pure and Applied Chemistry (IUPAC) in 2016. This name honors Professor Yuri Oganessian, a distinguished Russian nuclear physicist of Armenian descent. His pioneering research and leadership at the Flerov Laboratory of Nuclear Reactions at JINR have been instrumental in the discovery of numerous superheavy elements, pushing the boundaries of scientific knowledge about the atomic nucleus. Naming an element after him recognizes his profound and lasting contributions to the field of nuclear chemistry and physics.
Quick Facts About Oganesson
- Atomic Number: 118
- Symbol: Og
- Classification: Superheavy, synthetic element; theoretically located in the noble gas group (Group 18).
- Stability: Extremely unstable, with its most stable known isotope (Oganesson-294) having a half-life of less than one millisecond.
- Creation Method: Produced through nuclear fusion reactions by bombarding Californium-249 with Calcium-48 ions.