*atomic #118*
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(believed to be a “solid” under “normal” conditions)
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(‘oganesson’ is a ‘synthetic chemical element’ with symbol Og and atomic number ‘118’)
(it was first synthesized in 2002 at the “joint institute for nuclear research” (JINR) in (‘dubna’ / ‘russia’) by a joint team of ‘russian’ + ‘american’ scientists)
(in ‘december 2015’, it was recognized as 1 of 4 new elements by the ‘joint working party’ of the international scientific bodies ‘IUPAC’ and ‘IUPAP’)
(it was formally named on ’28 november 2016′)
(the name is in line with the tradition of honoring a ‘scientist’, in this case the nuclear physicist ‘yuri oganessian’, who has played a leading role in the discovery of the heaviest elements in the ‘periodic table’)
(it is 1 of only 2 elements named after a living person at the time of naming, the other being ‘seaborgium’)
(‘oganesson’ has the highest ‘atomic number’ and highest ‘atomic mass’ of all ‘known elements’)
(the radioactive oganesson atom is very ‘unstable’, and since ‘2005’, only 5 (possibly 6) atoms of the nuclide 294Og have been detected)
(although this allowed very little experimental characterization of its ‘properties’ and possible ‘compounds’, theoretical calculations have resulted in many predictions, including some surprising ones)
(for example, although ‘oganesson’ is a member of ‘group 18’ – the first ‘synthetic element’ to be so – it may be significantly ‘reactive’, unlike all the other elements of that group (the ‘noble gases’))
(it was formerly thought to be a ‘gas’ under ‘normal conditions’ but is now predicted to be a ‘solid’ due to ‘relativistic effects’)
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(on the ‘periodic table of the elements’, it is a ‘p-block element’ and the last one of the ‘7th period’)
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