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Name Oganesson
Symbol Og
Atomic number 118
Atomic mass [ 294 ] amu
Normal state presumably gaseous at 298 K
Classification Noble gas
Color probably colorless
Date of discovery 2002 (uninformed)
Name of discoverer Unknown
Name origin Named for Russian physicist Yuri Oganessian

Oganesson is the 118th element in the periodic table. There have been three atoms of it produced in a lab in Russia, though this has not been independently confirmed by the IUPAC.[1]


  1. Ununoctium at WebElements