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← ScienceWhich outcome occurs when enriched uranium-235 reaches criticality?
A)Uncontrolled chain fission reaction✓
B)Spontaneous alpha particle emission
C)Stable isotopic equilibrium achieved
D)Exponential reduction in neutron flux
💡 Explanation
An uncontrolled chain fission reaction occurs because neutron absorption causes nuclear fission, propagating more neutrons, therefore a runaway reaction occurs rather than a stabilized or decaying state of the isotopes under high concentration.
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