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← ScienceWhich consequence results when prolonged beta decay depletes a Strontium-90 foil?
A)Charge imbalance generates electrostatic stress✓
B)Recrystallization lowers mechanical strength
C)Increased alpha emission dominates hazard
D)Neutron activation boosts total activity
💡 Explanation
Accumulation of yttrium atoms with different proton numbers due to beta decay causes the net charge to become increasingly positive within the foil generating repulsive Coulomb forces; therefore, charge imbalance causes stress, rather than alpha emission or neutron activation.
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