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← ScienceWhich consequence results when iron nuclei reach maximal binding within stars?
A)Supernova core collapse ignition✓
B)Accelerated CNO cycle start
C)Runaway helium flash cooling
D)Stable white dwarf formation
💡 Explanation
Supernova core collapse occurs because iron’s maximal binding energy means further fusion is endothermic; therefore, gravity overwhelms thermal pressure, causing implosion rather than continued equilibrium supported by nuclear energy release.
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