Radioactivity — Question 13

Two examples of nuclear fusion are given below:

$\begin{matrix} _{1}^{1}\text{H} & + & _{1}^{1}\text{H} & \longrightarrow & _{1}^{2}\text{H} & + & 0.42\text{ MeV} \\ \footnotesize{\text{(proton)}} & & \footnotesize{\text{(proton)}} & & \footnotesize{\text{(deuterium)}} \end{matrix}$

$\begin{matrix} _{1}^{2}\text{H} & + & _{1}^{2}\text{H} & \longrightarrow & _{1}^{3}\text{H} & + & _{1}^{1}\text{H} & + & 4.0\text{ MeV} \\ \footnotesize{\text{(deuterium)}} & & \footnotesize{\text{(deuterium)}} & & \footnotesize{\text{(tritium)}} & & \footnotesize{\text{(proton)}} \end{matrix}$