With all news of element 117 being a step closer to the Island of stab

  1. ImageUploadedByPhysics Forums1399476024.542104.jpg
     
  2. jcsd
  3. How does this island work?
     
  4. what's the meaning of the question?
    By different colors you denote different stabilities...
    So you see regions closer to a line are more stable than the ones around them, and that stability falls as you go from the inside to the outside...
    So illustratively (I liked this one) you get something like an island (deeper in the land you are more stable, and as you move outside you "drop" closer to the sea/depths)
     
  5. Sorthal,
    thankyou for sharing this illustrative chart.
    that's a very nice graph of the upper end of the table of Elements and Isotopes.
    I suppose, there is also somewhere the lower end to be found ?

    As Nr. 117 is already more or less in the middle of that little island of semistables,
    there are obviously more buns in the avon ?
     
  6. mfb

    Staff: Mentor

    A large part of this graph is purely theoretical, as the isotopes have not been synthesized yet.
    While the proton number might be right for the island, it is unclear if there are enough neutrons to reach it. The produced isotopes have lifetimes of milliseconds - well in agreement with the isotopes of lighter elements nearby, so no sign of an island has been found yet.

    Wikipedia article with more details.
     
  7. Astronuc

    Staff: Mentor

    The superheavy elements do not appear to be as stable as hoped.

    http://www.ornl.gov/ornl/news/features/2014/new-sighting-of-superheavy-element-117

    http://www.ornl.gov/science-discove...-areas/isotopes/super-heavy-element-discovery

    http://www.scientificamerican.com/article/superheavy-element-117-island-of-stability/

    There are claims for Element 118 (ununoctium, Uuo):
    http://www.webelements.com/ununoctium/

    The yield is so small, the it is virtually impossible at this point to verify the existence of 118. An announcement during 1999 of 118 was later retracted.

    http://enews.lbl.gov/Science-Articles/Archive/118-retraction.html
     
  8. Thanks I’ll look it up n return later.
     
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