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Answer:
²³⁴₉₀Th --> ²³⁴₉₁Pa + ⁰₋₁e
Step-by-step explanation:
thorium-234 = ²³⁴₉₀Th
beta decay = ⁰₋₁e
protactinium-234 = ²³⁴₉₁Pa
The balanced nuclear equation is given as;
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