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|Atomic Number:||111||Atomic Symbol:||Rg|
|Atomic Weight:||280||Electron Configuration:||[Rn] 5f14 6d9 7s2|
|Melting Point:||Unknown||Boiling Point:||Unknown|
Roentgenium was first made by research scientists at the Heavy Ion Research
Laboratory in Darmstadt, Germany in 1994. The scientists bombarded nickel with bismuth in a heavy ion
accelerator. The element is named after physicist Wilhelm Conrad R??ntgen who
discovered X-rays in 1895.