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Homework Help: Binding E

  1. Aug 4, 2009 #1
    1. The problem statement, all variables and given/known data

    Calculate the binding energy of a neutron in 14N

    2. Relevant equations


    delta m * 1u + E

    3. The attempt at a solution

    The mass of Nitrogen (from periodic table): 14.007amu

    Calculated mass of N:
    7 protons (7 * 1.007277amu) + 7 neutrons (7* 1.008665amu) + 7 electrons (7*0.0005486)

    delta m=0.10839 amu

    delta m * 1u= 1.0096e2 MeV

    After I got the total binding energy I divided by 14 to get the binding energy of one neutron which was 7.21 MeV which was incorrect.
  2. jcsd
  3. Aug 4, 2009 #2


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    Homework Helper

    When you had [itex]\Delta m =0.10839 amu[/itex]

    did you eventually multiply by 1amu to convert to kg and then multiply by c2?
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