1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Why does uranium not have any stable isotopes?

  1. Jan 2, 2017 #1
    why uranium does not have any stable isotope?
  2. jcsd
  3. Jan 2, 2017 #2

    Paul Colby

    User Avatar
    Gold Member

    Well, this is the same as asking why every isotope of U has at least one open decay channel. This has to do with the binding energy of these nuclei and those that are connected via decay channels. Basically a restatement of your question. You could look at nuclear shell model and such. Hope this helps.
  4. Jan 2, 2017 #3


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

    Hi Mrinmoy,

    Did you notice that after Pb there are no stable isotopes at all ?
  5. Jan 2, 2017 #4
    yes.. the qus goes for all of those.
  6. Jan 2, 2017 #5

    Paul Colby

    User Avatar
    Gold Member

    What do all nuclei above Pb have more of than those before?
  7. Jan 3, 2017 #6


    User Avatar

    Staff: Mentor

    To greatly oversimplicate things, it boils down to how the repulsive force from protons competes with the attractive strong nuclear force, with a dash of quantum mechanical rules sprinkled in. Or, rather, dumped in by the gallon since this is absolutely a quantum scale system that can't be analyzed classically except to approximate things to various degrees.

    As Paul Colby said, you can look at various models, such as the nuclear shell model, to find out more info.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted