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प्रश्न
Two lithium nuclei in a lithium vapour at room temperature do not combine to form a carbon nucleus because
पर्याय
a lithium nucleus is more tightly bound than a carbon nucleus
carbon nucleus is an unstable particle
it is not energetically favourable
Coulomb repulsion does not allow the nuclei to come very close
उत्तर
Coulomb repulsion does not allow the nuclei to come very close.
Lithium atom contains 3 protons and 3 neutrons in the nucleus and 3 valence electrons. When two lithium nuclei are brought together, they repel each other. The attractive nuclear forces being short-range are insignificant as compared to the electrostatic repulsion. Thus, the nuclei do not combine to form carbon atom because of coulomb repulsion.
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संबंधित प्रश्न
When a boron nucleus `(""_5^10"B")` is bombarded by a neutron, a α-particle is emitted. Which nucleus will be formed as a result?
The graph of ln `("R"/"R"_0)` versus ln A (R = radius of a nucleus and A = its mass number) is ______.
Fusion processes, like combining two deuterons to form a He nucleus are impossible at ordinary temperatures and pressure. The reasons for this can be traced to the fact ______.
- nuclear forces have short range.
- nuclei are positively charged.
- the original nuclei must be completely ionized before fusion can take place.
- the original nuclei must first break up before combining with each other.
