Short Answer
The unstable isotope 234Th decays by β emission with a half-life of 24.5 days.The initial decay rate of the sample was 9.9 × 1013 Bq.(1 u = 1.6605 × 10-27 kg)
(a)What mass of 234Th was initially present?
(b)What is the decay rate after 68 days?
Correct Answer:
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(a)0.12 g ...View Answer
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