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118Og294.000
Oganesson
unknown, predicted to be noble gasOganesson 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.
Phase: Solid
2, 8, 18, 32, 32, 18, 8
Physical Properties
Atomic Mass294 u
Density4.95 g/cm³
Boiling Point350 K
Period7
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6
Semantic Config*[Rn] 5f14 6d10 7s2 7p6
Shells2, 8, 18, 32, 32, 18, 8
Electron Affinity5.40318 kJ/mol
Discovery
Discovered byJoint Institute for Nuclear Research