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प्रश्न
The isotope of 92U235 decays by alpha emission to an isotope of Thorium (Th). The Thorium isotope decays by beta emission to an isotope of Protactaminum (Pa). Write down the equations to represent these two nuclear changes.
उत्तर
\[\ce{_92U^238 -\underset{\text{(α-particles)}}{_2He^4} -> _90Th^234}\]
\[\ce{_90Th^234 - _\underset{\text{β-paricles}}{-1e^0}-> _91Pa^234}\]
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