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  • $\begingroup$ Ummm... It is helped to an extent but can you tell why does mass defect exactly occur??? What causes the mass of the final nucleus to be smaller then the initial Nuclei???? Why is this related to binding energy???? Please help ... $\endgroup$
    – Nuclear fusion
    Commented Jun 3, 2022 at 9:24
  • 2
    $\begingroup$ Mass and energy are the same thing of different forms. When nuclear fusion occurs, the anti particles of nucleons brake and build up a thousands of photons. The particles brake due to the energy required to fuse the nucleis. Photons are the energy particles of electromagnetic waves. The energy produced by the photons is called the binding energy. Because, some particles of the initial nuclei are converted into energy, the mass of the final nuclei is less than the initial nuclei. $\endgroup$
    – Debanjan Biswas
    Commented Jun 3, 2022 at 14:47
  • $\begingroup$ @Nuclearfusion Have you any doubt left in your mind? $\endgroup$
    – Debanjan Biswas
    Commented Jun 3, 2022 at 16:35
  • $\begingroup$ I still don't understand how does so much energy gets released during nuclear fusion? How is it related to mass defect and binding energy? Does negative potential energy play any role in it? Why is the helium nucleus at a lower energy state than hydrogen? $\endgroup$
    – Nuclear fusion
    Commented Jun 4, 2022 at 4:56
  • 1
    $\begingroup$ It means that mass and energy are two faces of a coin. A body's mass is its mass + energy contained in it. We can convert mass to energy by multiplying the speed. Of light squared $\endgroup$
    – Nuclear fusion
    Commented Jun 4, 2022 at 7:40