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A fusion reaction consists of combining ...

A fusion reaction consists of combining four protons into an `alpha`–particle. The mass of `alpha`–particle is 4.002603u and that of proton is 1.007825u, mass of electron is 0.00054466u.

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Mass defect `Deltam=4m_(H)-m_(He)-2m_(e)`
`Q=0.02608xx932(MeV)/u=25.7 MeV`
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