The binding energy per nucleon is greatest for:

Question

Quizplus · Accepted Answer

The most stable and tightly bound nuclei are those with a mass number close to that of iron (Fe), specifically nickel-62 (Ni-62). Atoms with odd numbers of both neutrons and protons tend to be less stable due to their asymmetry, so choice C can be ruled out. The binding energy per nucleon increases as the mass number approaches Ni-62, so choice B can also be ruled out. Finally, very light atoms (choice A) have relatively few nucleons and therefore fewer opportunities for strong nuclear forces to act on them in favorable ways, while very heavy atoms (choice B) have more nucleons, but the repulsive forces between protons become more significant and can overcome the attractive nuclear forces, making the nuclei less stable overall.

The Binding Energy Per Nucleon Is Greatest For