We have to show that the energy released when three alpha particles fuse to form is 7.27 MeV. The atomic mass of is 4.002603 u, and of is 12.000000 u.

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The energy that will be released when three alpha particles fuse to form can be calculated from the atomic mass of and the atomic mass of . The energy release will be the energy equivalent to the difference in mass of three atoms and one . That is