Answers In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is… In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is the half-life of the radioactive material? A. 2.54 days B. 4.00 days C. 4.80 days D. 6.00 days E. 8.00 days Correct Answer: Option B Explanation
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