Comment by cubefox
12 hours ago
The reason helium can't be produced chemically (like hydrogen can be produced e.g. from water) is that there are no natural chemical compounds which contain helium. That's because it doesn't form those compounds in the first place, since it's a noble gas.
Not at any temperature nor pressure found on Earth:
> These could exist in planets like Neptune or Uranus.
https://en.wikipedia.org/wiki/Helium_compounds