I read the question few more times and I still think it should kept closed: it is still unclear to me what OP is asking.
I don't quite understand how @Martin inferred that the question is about pure chemical substances consisting of just a single element. The phrase "all periodic table element molecules" can be interpreted differently which makes the question unclear. For instance, someone else could understand the question as it is about "all molecules of all elements" (which make is severely broad, by the way). The root of the interpretation problem here is that the term "element" has an ambiguous meaning (I quote from Wikipedia)
The term "element" is used for a kind of atoms with a given number of
protons (regardless of whether they are or they are not ionized or
chemically bonded, e.g. hydrogen in water) as well as for a pure
chemical substance consisting of a single element (e.g. hydrogen gas).
The unambiguous term "elementary substance" didn't become popular (unfortunately), so I would say it was (and still is) up to OP to clear up the above mentioned ambiguity. Interestingly, it looks like that the very tag elements (which currently has only one meaning of the term mentioned in its wiki1) was added by @Rubisco, and not by the OP. So, it has to be regarded as @Rubisco's interpretation which might not coincide with what OP meant originally.
1) I think this should be fixed. The tag wiki for elements should mention both meanings as it is done in the IUPAC Gold Book. I also think that we shall try to have IUPAC definitions quoted in all our tag wikis, but that is a different story...