Question 19 of 24 > What is the half-life of an isotope that decays to 12.5% of its original activity in 31.5 h? half-li
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Question 19 of 24 > What is the half-life of an isotope that decays to 12.5% of its original activity in 31.5 h? half-li
Question 19 of 24 > What is the half-life of an isotope that decays to 12.5% of its original activity in 31.5 h? half-life: 33 Incorrect Attempt 1 h