Comment by hughesjj

Technically speaking big bang nucleosynthesis/baryogensis produced elements as heavy as lithium with some abundance, but yeah still dominated by hydrogen (and whatever other exotic non-baryonic .... stuff is out there)

- https://en.wikipedia.org/wiki/Baryogenesis

- https://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis

Also, this is a great image showing the proportions of elements based on source

https://en.wikipedia.org/wiki/Chemical_element#/media/File:N...