write the IUPAC name and symbol of the element with atomic number 149
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There's no element with atomic number 149...
But its IUPAC name is unquadnonium
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No such element is present with atomic number 49 but theoretically it exists with the name of Avogadrium and symbol as Av.
Following the IUPAC nomenclature rules, it can be written as : Unquadennium( symbolised as Uqe).
Avogadrium is the non-systematic name of this theoretical element and has been named after Amedeo Avogadro( the one who determined the Avogadro's constant).
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