What's the lifespan of Deuterium and Helium-3 in the sun? How long on average, the Deuterium and Helium-3 atoms last in the Sun's core?
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According to the current version of Wikipedia’s article on the proton-proton chain, typical lifetimes are
- protons: $10^{10}$ years (i.e. the lifetime of the Sun)
- deuterons: about one second
- helium-3: about 400 years
