Binding energy curve (average binding energy per nucleon in MeV against number of nucleons in nucleus) for a number of relatively common (abundant) isotopes (not chosen systematically; almost anything with an occurence of over .2 was chosen though a few exceptions are in there, such as U235). A few important ones for the purposes of nuclear fusion and nuclear fission are marked, as well as iron-56, which sits at the highest point on this graph and cannot yield energy from fusion or fission.   Data set was taken from <a rel="nofollow" class="external text" href="http://www.einstein-online.info/en/spotlights/binding_energy/binding_energy/index.txt">here</a> and the exact set used to generate this graph has been posted to this <a href="//commons.wikimedia.org/wiki/File_talk:Binding_energy_curve_-_common_isotopes.svg" title="File talk:Binding energy curve - common isotopes.svg">talk page</a>.   Created in Excel, exported to Adobe Illustrator, exported to Inkscape, and rendered into this graph, by <a href="//commons.wikimedia.org/w/index.php?title=User:Fastfission&amp;action=edit&amp;redlink=1" class="new" title="User:Fastfission (page does not exist)">User:Fastfission</a>.   ==
<ul><li><a href="//commons.wikimedia.org/wiki/File:Binding_energy_curve_-_common_isotopes.svg" title="File:Binding energy curve - common isotopes.svg">Binding_energy_curve_-_common_isotopes.svg</a>: <b><a href="//commons.wikimedia.org/w/index.php?title=User:Fastfission&amp;action=edit&amp;redlink=1" class="new" title="User:Fastfission (page does not exist)">Fastfission</a></b></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:R%CE%B1ge" title="User:Rαge">r@ge</a> (<a href="//commons.wikimedia.org/wiki/User_talk:R%CE%B1ge" title="User talk:Rαge"><span class="signature-talk">talk</span></a>)</li></ul>
<ul><li><a href="//commons.wikimedia.org/wiki/File:Binding_energy_curve_-_common_isotopes.svg" title="File:Binding energy curve - common isotopes.svg">Binding_energy_curve_-_common_isotopes.svg</a></li></ul>