The physical process wherein a heavy atomic nucleus splits apart into two lighter fragments is designated as_________________?
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Answer: B. fission
Explanation
Nuclear fission describes the physical process where a heavy atomic nucleus splits into lighter fragments. This splitting event is triggered when a heavy nucleus absorbs an incoming neutron and becomes unstable. The resulting fragments fly apart with immense kinetic energy accompanied by several free neutrons. Heavy elements like uranium and plutonium are prone to fission because electrostatic repulsion outweighs strong forces. Nuclear binding energy per nucleon peaks around iron making heavier elements energetically unstable when split. The term fission was coined by physicists drawing an analogy to biological cell division processes.
Fission forms the fundamental scientific basis for both nuclear weapons and commercial nuclear power plants. Controlling this splitting process allows engineers to harness steady thermal energy for electrical generation. Understanding fission mechanics helps scientists manage radioactive waste products resulting from power generation. Splitting is a colloquial term lacking the specific scientific precision of nuclear physics nomenclature. Fusion involves combining light atomic nuclei together rather than splitting heavy nuclei apart. Disintegration is a general term encompassing various radioactive decay modes rather than specific nucleus splitting.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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