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Roentgenium

German scientists succeeded in fusing bismuth and nickel to produce roentgenium, the 111th element on the periodic table, on December 8, 1994.

Because of its high radioactivity, few atoms of this element have been synthesized. Roentgenium has only been created and used in research environments. Chemically, this element is similar to copper, silver, and gold.

Formerly known as unununium (Uuu), roentgenium (Rg) was officially renamed in 2004 to honour Nobel Prize physicist Wilhelm Conrad Roentgen for his discovery of x-rays in 1895.