Answer:In the periodic table, element number 118 is Oganesson, with the symbol Og. It's a synthetic, radioactive element, and the last of the known elements in the periodic table. It's classified as a noble gas, though it's expected to be reactive and form compounds. Here's a more detailed breakdown:Atomic Number 118: This number indicates the number of protons in an atom of Oganesson. Oganesson (Og): This is the name given to element 118, honoring physicist Yuri Oganessian. Synthetic and Radioactive: Oganesson doesn't occur naturally and is created in laboratories through nuclear reactions. Noble Gas: While classified as a noble gas, it's theorized to be more reactive than other noble gases, potentially forming compounds, according to PubChem. Part of the Periodic Table: It occupies the last position in the current periodic table, marking the end of the known elements.