Element 118: Oganesson
Element 118 on the periodic table is known as Oganesson (Og). It is a synthetic element, and its discovery was a significant milestone in the field of chemistry and physics.

Key Characteristics of Oganesson:
- **Atomic Number**: Oganesson has an atomic number of 118, which places it at the very end of the periodic table.
- **Naming**: The element is named after the Russian physicist Yuri Oganessian, who contributed significantly to the discovery of superheavy elements.
- **Classification**: Oganesson is classified as a noble gas, although it is expected to have properties that differ from the other noble gases due to relativistic effects.

Discovery and Synthesis:
- **First Created**: Oganesson was first synthesized in 2002 by a team of Russian and American scientists at the Joint Institute for Nuclear Research in Dubna, Russia.
- **Production Method**: It was created by bombarding californium (element 98) with calcium ions (element 20).

Properties and Research:
- **Stability**: Oganesson is highly unstable and radioactive, with a very short half-life. The most stable isotope, Oganesson-294, has a half-life of less than a millisecond.
- **Theoretical Predictions**: Due to its high atomic number, theoretical predictions suggest that Oganesson could exhibit unique behavior that deviates from the trends observed in lighter noble gases.
In summary, Oganesson is a fascinating element that represents the cutting edge of modern chemistry and physics, and its study helps scientists understand the limits of the periodic table and the behavior of superheavy elements.