20. Determine the energy change involved in the fusion of two hydrogen nuclei as indicated by the following equation. Assume that a neutrino has no mass. This reaction is one of the many fusion reactions that take place in the Sun. { }_{1}^{1} \mathrm{H}+{ }_{1}^{1} \mathrm{H} \rightarrow{ }_{1}^{2} \mathrm{H}+{ }_{1}^{0} \mathrm{e}+V_{\mathrm{e}}

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