What happens to hydrogen atoms at very high temperatures?
Plz check explanation .
if you are looking for nuclear fusion .
nuclear fusion is a type nuclear reaction in which 2 or more atoms combine to form heavier atom .
If we checkout the working of hydrogen bomb . first nuclear fission is used to create high temperature which initiates nuclear fusion of hydrogen resulting in epic damage .
At sun ,hydrogen when subject to extreme pressure and temperature converts in helium .
So, I feel the answer to your qyestion would be; formation of helium from hydrogen by the process of nuclear fusion .