Nuclei - Result Question 30

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31. The mass of a $ _3^{7} Li$ nucleus is $0.042 u$ less than the sum of the masses of all its nucleons. The binding energy per nucleon of $ _3^{7} Li$ nucleus is nearly

======= ####31. The mass of a $ _3^{7} Li$ nucleus is $0.042 u$ less than the sum of the masses of all its nucleons. The binding energy per nucleon of $ _3^{7} Li$ nucleus is nearly

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/nuclei/nuclei—result-question-30.md (a) $46 MeV$

(b) $5.6 MeV$

(c) $3.9 MeV$

(d) $23 MeV$

[2010]

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Answer:

Correct Answer: 31. (b)

Solution:

  1. (b) B.E. $=0.042 \times 931 \simeq 42 MeV$

Number of nucleons in $ _3^{7} Li$ is 7 .

$\therefore$ B.E. $/$ nucleon $=\frac{42}{7}=6 MeV \simeq 5.6 MeV$