Corefission of Uranium 235 (note: the neutron symbol should be 'n', 'N' being nitrogen ; Kernspaltung.svg is correct)
<a href="//commons.wikimedia.org/wiki/User:Stefan-Xp" title="User:Stefan-Xp">Stefan-Xp</a>
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<span class="int-own-work" lang="en">Own work</span>