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!

Liquid drop model

  1. Aug 22, 2011 #1
    the atomic nucleus mass is given by


    but why is it a minus away of binding energy / c2 = mass of the empty parts of the nucleus?

    shouldn't it be a plus?

    mass of nucleus = proton mass + neutron mass + mass of empty parts of the nucleus?
  2. jcsd
  3. Aug 22, 2011 #2


    User Avatar

    Binding energy is an energy you must provide to separate nucleons. So you have energy conservation: mass of nucleus + energy required to separate nucleons = sum of masses of nucleons
  4. Aug 22, 2011 #3
    oh i see than kyou
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook