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← ScienceWhich outcome results when helium-4 nuclei reach the endpoint of stellar nuclear fusion, regarding its overall energy output?
A)Energy release through alpha capture
B)Further fusion yielding light elements
C)Net energy absorption via fusion✓
D)Iron production starts spontaneously inside
💡 Explanation
Helium-4 fusion into heavier nuclei absorbs energy overall because the binding energy per nucleon for elements heavier than helium decreases; therefore no energy is released, rather than exothermic fusion observed with lighter elements, because the strong force is less effective at that atomic weight.
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