Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?
Correct answer: B. Greater than 82
- A. Smaller
- B. Greater than 82
- C. Same
- D. Sometimes smaller some times greater
Explanation
The separate nucleons have slightly greater total mass than the bound nucleus; the difference is the mass defect and corresponds to nuclear binding energy. Therefore the sum is greater than the resultant nuclear mass. The likely trap is option c, which ignores the conversion of mass into binding energy. Option b appears to contain a typographical error after the word 'than', but its intended comparison is clear.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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