The difference between a nucleus mass and the total mass of its free nucleons is the:
AMass ratio
BMass defect
CMass number
DMass excess
Answer & Solution
Correct answer: B. Mass defect
1. Free nucleons weigh more than the bound nucleus.
2. That missing mass has a name.
3. It is the mass defect.
_Source: syllabus Physics Part II, Class XII, Chapter 13, Nuclei._
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