โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Dubnium
  • ๐Ÿ‡บ๐Ÿ‡ฆ ะ”ัƒะฑะฝั–ะน
  • ๐Ÿ‡จ๐Ÿ‡ณ ๐จง€
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Dubnium
  • ๐Ÿ‡ซ๐Ÿ‡ท Dubnium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Dubnium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ื“ื•ื‘ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Dubnio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ‰ใƒ–ใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Dubnium
  • ๐Ÿ‡ช๐Ÿ‡ธ Dubnio
  • ๐Ÿ‡ธ๐Ÿ‡ช Dubnium
  • ๐Ÿ‡ท๐Ÿ‡บ ะ”ัƒะฑะฝะธะน

Dubnium - 105Db: historical information

  • Discoveror: Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA.
  • Place of discovery: USSR, United States
  • Date of discovery: 1967
  • Origin of name : the origin of the name dubnium is the Joint Nuclear Institute at Dubna", an institute heavily involved in the search for heavy elements.

Dubnium apparently was synthesized by Russian and American workers independently by bombardment technologies. Its actual isolation as the free element has not been accomplished. In 1967, Flerov reported element 105 after experiments at the Joint Research Institute in Russia involving reactions between 243Am ions with 22Ne ions. In 1970, Ghiorso and others announced their synthesis of dubnium at Berkeley (California) in the USA. This method involved the collsion of 249Cf ions with 15N ions.