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Lanthanides & 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


--Info & DownloadsBibliography  [textbook & online resources]

Source: Dr. S.J. Heyes; University of Oxford
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