Originally Posted by
Wildwood
You hugely overestimate Human Knowledge.
Not really. Every element on the periodic table can be seen in the spectra of stars. The nature of the elements also don’t allow for any elements in between the elements we already know. No element between two elements is possible. There can’t be an element between aluminum (13 protons) and silicon (14 protons), for example, because there is no such thing as half a proton. There may be heavier elements that aren’t on the periodic table but, so far, all the ones discovered are highly unstable and split into something else very rapidly.