A) greater than mass of nucleus
B) equal to mass of nucleus
C) same as mass of nucleus
D) None of the above
Correct Answer: A
Solution :
When nuclear masses are measured, the mass is always found to be less than the sum of the masses of the individual nucleons bound in the nucleus. This difference between the nuclear mass and the sum of individual masses is known as mass defect. Hence mass of nucleons \[=isotopic\text{ }mass+mass\text{ }defect~~\] Hence, mass of nucleons together in a heavy nucleus is greater than the mass of nucleus.
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