Hydrogen and helium were the first elements formed after the Big Bang.
NOT BSTOTAL BS
NOT BS — Verdict: True
Verified by Lenz ·
The Short Version
The evidence shows that the earliest primordial elements were hydrogen and helium, formed in the first minutes after the Big Bang. Authoritative cosmology sources consistently describe them as the first and dominant products of Big Bang nucleosynthesis. Small amounts of other light nuclides, especially lithium-7, were also produced, but that does not overturn the claim’s core meaning.
Caveats
The claim is accurate but simplified: Big Bang nucleosynthesis also produced trace amounts of lithium-7 and other light nuclides.
Deuterium and helium-3 formed early as well, but these are isotopes of hydrogen and helium rather than additional major primordial elements.
A stricter phrasing would be: hydrogen and helium were the first and overwhelmingly dominant elements formed after the Big Bang.