ACTINIDES

Trans-Actinide Elements

• Some atoms of elements 104 - 112 have probably been made

  ~ some are the subject of dispute:-

  • have they been made?
  • who made them first?
  • what should they be called?
• They are assumed to comprise the start of a 4th Transition Series, but chemical data is sketchy!
• Any prospects for heavier elements?
  • Plots of Half-life of Longest-Lived Isotope vs Z don't hold out much hope!

    

  • Search for a "Magic Island"

    Nuclear structure calculations Þ possibly stable nuclei for Z ~ 114

    but no confirmed reports synthetically or in nature