โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Roentgenium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้Œ€
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Roentgenium
  • ๐Ÿ‡ซ๐Ÿ‡ท Roentgenium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Roentgenium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืจื ื˜ื’ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Roentgenio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒฌใƒณใƒˆใ‚ฒใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Roentgenio
  • ๐Ÿ‡ท๐Ÿ‡บ ะ ะตะฝั‚ะณะตะฝะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Roentgenio
  • ๐Ÿ‡ธ๐Ÿ‡ช Roentgenium

Roentgenium: historical information

  • Discoveror: S. Hofmann, V. Ninov, F. P. Hessberger, P. Armbruster, H. Folger, G. Münzenberg, and others
  • Place of discovery: Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.
  • Date of discovery: 1994
  • Origin of name : the proposed name roentgenium has yet ot be accepted formally, but lies within the long established tradition of naming elements to honour famous scientists. Wilhelm Conrad Roentgen discovered X-rays in 1895.

Element 111, roentgenium, was discovered towards the end of 1994 at the GSI in Darmstadt, Germany. Three atoms of an isotope 272Uuu were produced in reactions between 209Bi targets and 64Ni projectiles. To achieve this, the nickel atoms were accelerated to high energies by the heavy ion accelerator UNILAC at GSI and directed onto a lead target.