Helium and Hydrogen Formed?
a) a few minutes after the big bang
c) inside stars
d) interstellar medium
- PaulLv 79 years agoFavorite Answer
Hydrogen and Helium formed about 3-20 minutes after the big bang during the nucleosynthesis epoch.
Helium is still being formed inside stars.
Heavier elements are formed inside supernovae, it might be possible that some leftover hydrogen becomes helium and it's probable that ionised hydrogen atoms (alpha radiation and beta radiation) are coalescing in the interstellar medium at some point when they have lost sufficient energy to become helium atoms.
If pushed then I'd have to say all of the above.
- 9 years ago
Hydrogen formed around 377.000 years after the big bang. Hydrogen and helium at the start are ionized ie no electrons bound to the nuclei ( containing positively charged protons). How helium formed is through hydrogen burning which is the fusion of four hydrogen nuclei in to a single helium nucleus ( 2 protons + 2 neutrons)
- Chandramohan P.RLv 79 years ago
After few million years after big bang not few minutes.