The Hydrogen in the Outer Layers of the Sun Cannot

question 89

Multiple Choice

The hydrogen in the outer layers of the Sun cannot undergo fusion because the

• A) hydrogen in the outer layers is fundamentally different from the hydrogen in the core.
• B) hydrogen in the outer layers is pure,and hydrogen must be mixed with helium,as it is in the core,in order to undergo fusion.
• C) temperature in the outer layers is too low to allow the hydrogen nuclei to come close enough together to undergo fusion.
• D) hydrogen atoms in the surface layers are not ionized,as they are in the core,and ionization is one requirement for nuclear fusion.

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