system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If you can get a nuclear explosion by striking a Uranium 235 nucleus, why can't you get a nuclear explosion by striking any other element's nucleus?
gpt
The unique thing about U235 is that, when it is struck by a neutron, it splits and gives off multiple neutrons as part of the process of splitting. This means that one nucleus splitting can induce others nearby to split.

Not all nuclear reactions are like that.