Concept:Nuclear fission is the splitting of a heavy nucleus into lighter fragments, best explained by the model that describes the nucleus as a deformable, cohesive system.
Explanation:1.
Liquid Droplet Theory treats the nucleus like a liquid drop held together by surface tension (nuclear forces). This model explains:
- Why heavy nuclei become unstable and split
- How the nucleus can oscillate and deform
- The energy released during fission (binding energy difference)
2.
Why other options don't explain fission:- Yukawa π-meson theory: Explains nuclear forces, not fission mechanism
- Independent particle model: Describes individual nucleon behavior in energy levels, not collective deformation and splitting
- Proton-proton cycle: Explains nuclear fusion in stars, not fission
3.
Key insight: The liquid droplet model shows that when a nucleus absorbs energy (from a neutron), it oscillates like a liquid drop. If oscillations are large enough, the drop splits into two smaller drops (fission fragments), releasing enormous energy.
Answer:A. Liquid droplet theoryThe liquid droplet theory best explains nuclear fission because it models the nucleus as a deformable, cohesive system that can oscillate and split when disturbed, directly accounting for the fission process.
