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← ScienceWhich consequence results when helium-4 nuclei achieve iron-56 relative size?
A)Iron undergoes neutron star collapse
B)Fusion energy yield reaches maximum✓
C)Fission reactions spontaneously cease entirely
D)Alpha becomes highly beta radioactive
💡 Explanation
Maximum nuclear binding energy per nucleon is achieved in iron-56 due to optimized strong nuclear force. Therefore, further fusion requires net energy input, rather than yielding energy, because binding efficiency decreases with larger nuclei.
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