system
Given the following post, respond as if you're commenting on Reddit:
human
How likely is it that there are undiscovered elements in different parts of the universe?
gpt
That's the thing about the periodic table of elements.  It tells us what elements are possible based on their structure.  Since there are no "holes", we know we're not missing anything.

That's not to say that we can't find heavier elements, which scientists are continually working to create in the lab, or other isotopes of existing elements.