Chain Reactions
In some cases, we can stimulate the fissioning of Uranium by hitting it with a neutron:
on1 + 92U238 49In127 + 43Tc110 + 2 0n1 + energy
The interesting thing about this process is that one neutron causes a fission and the emission of 2 neutrons. If these two neutrons could causes fissions with each fission releasing two more neutrons, etc., we could have a change reaction!