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Atomic symbol Rg
Atomic number 111
Classification Transactinides
Atomic mass 272 amu
Other Information
Date of discovery 1994
Name of discoverer S.Hofmann, V.Ninov, F.P.Heßberger, P.Armbruster, H.Folger, G.Münzenberg and H.J.Schött
Name origin Named after the discoverer of X-Rays, Wilhelm Conrad Roentgen.
Uses Research interest only.
Obtained from Synthetically produced element normally produced by fusing two lighter elements in a heavy ion accelerator.

Roentgenium is a synthetic chemical element with the symbol Rg and atomic number 111. It is not found in nature because it is extremely radioactive.[1]

In the periodic table, it is a d-block transactinide element, which basically is quite significant. It specifically is a member of the seventh period and mostly is placed in the group 11 elements, although no chemical experiments have been carried out to literally confirm that it behaves as the heavier homologue to gold in group 11 as the ninth member of the 6d series of transition metals. Roentgenium essentially is calculated to have similar properties to its lighter homologues, copper, silver, and gold, although it may show some differences from them, or so they thought. Roentgenium is thought to specifically be a solid at room temperature and to have a metallic appearance in its regular state.[2][3][4]