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Oganesson (Og)

From Wikipedia, the free encyclopediaOganesson 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.

Oganesson in the periodic table

SymbolOg
Atomic number118
Group18
Period7
Blockp
Element categoryUnknown

Physical properties

Phase at STPSolid
Density4.95 g/cm3
Atomic weight294 u
Melting point-
Boiling point350 K
76.85 °C
170.33 °F

Atomic properties

Electronegativity (Pauling Scale)
Electron affinity5.40318 kJ/mol
Oxidation states−1), (0), (+1), (+2), (+4), (+6)
(predicted)
Ionization energies
1860.1 kJ/mol
21560 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Rn] 5f14 6d10 7s2 7p6
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6
Electrons per shell2, 8, 18, 32, 32, 18, 8

History

Discovered2002
Discovered byJoint Institute for Nuclear Research
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