Oganesson is a synthetic element with the symbol Og and atomic number 118. It is classified as a noble gas, although its properties are not well understood due to its instability and rarity. Oganesson was first synthesized in 2002 by a team of Russian and American scientists, and it is named after the physicist Yuri Oganessian, who contributed significantly to the discovery of superheavy elements. This element is highly radioactive and has a very short half-life, making it difficult to study. Oganesson is believed to have unique characteristics that differ from other noble gases, such as Xenon and Radon, due to relativistic effects. Its discovery helps scientists explore the limits of the periodic table and the behavior of heavy elements.