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Write a balanced equation of a nuclear fission reaction taking place in a nuclear reactor. By…

Physics20255 marksShort answer
(a)
Write a balanced equation of a nuclear fission reaction taking place in a nuclear reactor.
(b)
By performing necessary calculations, determine which one of the following nuclei is more stable: $^4\text{He}$ nucleus having binding energy of $28.8\text{ MeV}$ or $^9\text{Be}$ nucleus having binding energy of $63\text{ MeV}$.
(c)
(1) Draw energy level diagram of hydrogen atom showing at least four (lowest) energy levels. (2) Show any one transition on this diagram which results in the emission of light energy.

Draw: energy level diagram of hydrogen atom

Must show: four lowest energy levels: n=1, 2, 3, 4 with corresponding energy values, one transition resulting in emission of light energy (visible light: Balmer series)

Answer

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Nuclei

From ISC 2025 Improvement Physics Paper 1, question 19(ii).