Duba zuwa sashi na ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda sashi: Passage: An fara hada Roentgenium ne ta hanyar ƙungiyar ƙasa da ƙasa wanda Sigurd Hofmann ya jagoranta a Gesellschaft für Schwerionenforschung (GSI) a Darmstadt, Jamus, a ranar 8 ga Disamba, 1994. Tawagar ta harba makasudin bismuth-209 tare da ƙwayoyin nickel-64 da aka hanzarta kuma ta gano ƙwayoyin uku na isotope roentgenium-272: Tambaya: A wace ƙasa aka fara hada Roentgenium?
Jamus