โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Neptunium
  • ๐Ÿ‡บ๐Ÿ‡ฆ ะะตะฟั‚ัƒะฝั–ะน
  • ๐Ÿ‡จ๐Ÿ‡ณ ้Œผ
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Neptunium
  • ๐Ÿ‡ซ๐Ÿ‡ท Neptunium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Neptunium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ื ืคื˜ื•ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Nettunio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒใƒ—ใƒ„ใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Neptúnio
  • ๐Ÿ‡ช๐Ÿ‡ธ Neptunio
  • ๐Ÿ‡ธ๐Ÿ‡ช Neptunium
  • ๐Ÿ‡ท๐Ÿ‡บ ะะตะฟั‚ัƒะฝะธะน

Neptunium - 93Np: historical information

  • Discoveror: Edwin M. McMillan and P. H. Abelson
  • Place of discovery: USA
  • Date of discovery: 1940
  • Origin of name : named after "the planet Neptune".

Neptunium was the first synthetic transuranium element of the actinide series. It was discovered by McMillan and Abelson in 1940 at Berkeley, California, USA, who bombarded uranium with neutrons produced from a cyclotron. It was the first synthetic transuranium (elements after uranium) element discovered.