undiscovered element?

Question

Is every element on the table of Mendeljev already found on Earth, or are there still some undiscovered?

Answer 1

There are some elements that are only theoretical. They can be predicted using the elemental chart but they have not been discovered. This is probably because they will not ever form under natural circumstances or their half-life is so small that they will not ever last in a natural setting long enough to be detected.

I would say that every element that occurs naturally is represented on the table.