system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible that, given differences in gravity and magnetic fields, an element that is unstable on this planet could exist naturally on another?
gpt
Not really. An element is unstable if the nucleus is too big to be held together by the weak and strong force.

Those two forces are a **lot** bigger at those distances, than gravity or the EM force, so those two are negligible.

Consider this: if you hold one of those fridge-magnets face down and put a paper clip on the magnet, the magnet will be able to hold the paper clip against gravity. So this tiny magnet's force on the clip is bigger than the gravitational force of the entire earth. That is, because gravity is an extremely weak force compared to the EM force. 


The same relation is true for strong/weak force and EM.