MAIN IDEA: Nuclear fusion reactions are exothermic and produce significantly more energy per mass of fuel than fission reactions.

$5.$ Look at Figure $1$ showing the relationship between binding energy and mass number. Summarize how the slope of the line for mass numbers $80$ and higher compares to the slope of the line for mass numbers $20$ and lower. Summarize how this relates to the relative amount of energy produced by fission reactions

Binding Energy v$.$ Mass Number