โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Plutonium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้ˆฝ
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Plutonium
  • ๐Ÿ‡ซ๐Ÿ‡ท Plutonium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Plutonium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืคืœื•ื˜ื•ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Plutonio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ—ใƒซใƒˆใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Plutônio
  • ๐Ÿ‡ท๐Ÿ‡บ ะŸะปัƒั‚ะพะฝะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Plutonio
  • ๐Ÿ‡ธ๐Ÿ‡ช Plutonium

Plutonium: historical information

  • Discoveror: Glenn T. Seaborg , J. W. Kennedy, E. M. McMillan, A. C. Wahl
  • Place of discovery: USA
  • Date of discovery: 1940
  • Origin of name : named after "the planet Pluto".

Plutonium was synthesized by Seaborg, McMillan, Kennedy and Wahl in 1940 by deuteron bombardment of uranium in a cyclotron (a device used to accelerate atomic particles) at Berkeley, California, USA. Plutonium was the second transuranium element of the actinide series to be discovered. In 1808 plutonium was suggested as a name for element 56 but Sir Humphrey Davy's original name of barium for element 56 still stands.