Category:Roentgenium
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A synthetic radioactive chemical element with the symbol Rg and the atomic number 111. First observed in 1994. | A synthetic radioactive chemical element with the symbol Rg and the atomic number 111. First observed in 1994. | ||
[[Category:Elements|{{PAGENAME}}]] | [[Category:Elements|{{PAGENAME}}]] | ||
Latest revision as of 15:59, 13 February 2013
A synthetic radioactive chemical element with the symbol Rg and the atomic number 111. First observed in 1994.
