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Which 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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