โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Mendelevium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้†
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Mendelevium
  • ๐Ÿ‡ซ๐Ÿ‡ท Mendélévium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Mendelevium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืžื ื“ืœื‘ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Mendelevio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒกใƒณใƒ‡ใƒฌใƒ“ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Mendelévio
  • ๐Ÿ‡ท๐Ÿ‡บ ะœะตะฝะดะตะปะตะฒะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Mendelevio
  • ๐Ÿ‡ธ๐Ÿ‡ช Mendelevium

Mendelevium: historical information

  • Discoveror: Glenn T. Seaborg, Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley G. Thompson
  • Place of discovery: USA
  • Date of discovery: 1955
  • Origin of name : named after Dimitri "Mendeleev", the Russian chemist who contributed so much to the development of the periodic table.

Mendelevium, the ninth transuranium element of the actinide series to be discovered, was first identified by Seaborg and others in 1955 as a product of the bombardment of the einsteinium isotope 253Es with helium ions. The isotope produced was 256Md, which has a half-life of about 11/4 hours.