State what nuclear fusion means.
On Fig. 9.1, sketch the change in binding energy per nucleon with nucleon number $A$ for $A$ values from $1$ to $250$.
On your line in Fig. 9.1, label a point $X$ that could stand for a nucleus that undergoes alpha-decay.
On your line in Fig. 9.1, label a point $Y$ that could stand for a nucleus that undergoes nuclear fusion.
A nucleus $Z$ undergoes nuclear fission to produce strontium-93 $\left(^{93}_{38}\text{Sr}\right)$ and xenon-139 $\left(^{139}_{54}\text{Xe}\right)$ according to $^{1}_{0}\text{n} + Z \rightarrow ^{93}_{38}\text{Sr} + ^{139}_{54}\text{Xe} + 2\,^{1}_{0}\text{n}$. Table 9.1 gives the binding energies of the strontium-93 and xenon-139 nuclei. The fission of $1.00\,\text{mol}$ of $Z$ releases $1.77 \times 10^{13}\,\text{J}$ of energy. Determine the binding energy per nucleon, in $\text{MeV}$, of $Z$.