Noble gas, atomic number 118.
Oganesson 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.
Symbol Og. Atomic mass 294.0 u. Group 18, period 7. Electron configuration [Rn] 5f14 6d10 7s2 7p6. Electrons per shell 2, 8, 18, 32, 32, 18, 8. State at room temperature: Solid. Melting point unknown, boiling point 76.9 °C. Discovered by Joint Institute for Nuclear Research.
Element data from Wikipedia, CC BY-SA 3.0.