system
Given the following post, respond as if you're commenting on Reddit:
human
Can Nuclear Fisson occur without uranium?
gpt
Yes.  Nuclear fission can occur for numerous elements.  Fission occurs in all actinides along with the super heavy elements.  Spontaneous fission can occur for elements that fit the equation Z^2 /A>=47, where Z is the atomic number and A is the atomic mass.  This is a rough equation, but it is fairly accurate.  It is theorized that some light elements like molybdenum may even spontaneously fission.