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← ScienceWhich outcome increases sharply as isotope binding energy nears iron?
A)Probability of nuclear fusion events
B)Neutron absorption cross-section declines
C)Spontaneous alpha decay decelerates
D)Isotope stability relative to fission✓
💡 Explanation
Isotopes near iron are more stable due to nuclear binding energy per nucleon maximization, so fission events become less favored. Lower fission favors stability because energy decreases rather than increasing susceptibility; therefore stability changes outweigh alternate decay modes.
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