Binding Energy Worksheet - Answer Key

 

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  1. What force holds the nucleus together?

    The Strong Force.

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  2. Where is the energy for this binding force derived?

    From the nucleons (neutrons and protons). 

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  3. What do we look at to determine the binding energy?

    We look at the “mass defect” – the difference between the expected mass based on the total number of proton and neutrons in the nucleus and the actual measured mass.

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  4. What equation can be used to relate mass energy?

    E = mc2

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  5. The sun radiates 3.9 x 1023J of energy into space every second.  What is the rate at which mass is lost from the sun?

    m = 4.3 x 106 kg/s

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  6. The most stable nucleus in terms of binding energy per nucleon is 56Fe.  If the atomic mass of 56Fe is 55.9349 amu.  Calculate the binding energy per nucleon for 56Fe. (1 amu = 1.66054 x 10-27 kg)

    mn = 1.00866 amu      mp = 1.00728 amu      me = 5.48580 x 10-4 amu

    E = 4.41 x 10–12 J/nucleon

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