Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Why there is mass defect?

  1. Nov 3, 2004 #1
    why there is mass defect in a nuclide?
    thank you.
  2. jcsd
  3. Nov 3, 2004 #2

    James R

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    The nucleus has a lower mass than its constituent nucleons (protons and neutrons) when they are free particles.

    The "missing mass" or "mass defect" is the amount of mass converted to binding energy when the nucleus formed (E=mc^2).
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook