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Nuclei — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
The mass defect per nucleon is called:
  • A
    Binding energy
  • B
    Packing fraction
  • C
    Ionisation energy
  • D
    Excitation energy
✓

Answer

  1. Packing fraction

Explanation:

Nuclear binding energy can be computed from the difference in mass of a nucleus, and the sum of the masses of the number of free neutrons and protons that make up the nucleus. Once this mass difference, called the mass defect or mass deficiency, is known, Einstein's mass-energy equivalence formula can be used to compute the binding energy of any nucleus.

Early nuclear physicists used to refer to computing this value as a "packing fraction" calculation.

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