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Post Info TOPIC: Roentgenium


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RE: Roentgenium
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Roentgenium was first observed in 1994 and several isotopes have been synthesized since its discovery.
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Roentgenium is a synthetic radioactive chemical element with the symbol Rg and atomic number 111. It is placed as the heaviest member of the group 11 (IB) elements, although a sufficiently stable isotope has not yet been produced in a sufficient amount that would confirm this position as a heavier homologue of gold.
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