Question: I need help with Question #2 Pg 694 Practice Y. The half-life of ;:Sr is 28 a. If 60 g of 3:Sr is currently in

I need help with Question #2

Pg 694 Practice Y. The half-life of ;:Sr is 28 a. If 60 g of 3:Sr is currently in a sample 7 5q of soil, estimate the amount of 3:Sr in the same sample 84 a later. 2. Tritium (H), a by-product of the CANDU nuclear power reactor, has a half-life of 12.3 a. How much time is required for its radioactivity to reach one-quarter of its original level? 3. The radioactivity of a sample is found to have decreased to one- sixteenth of its original level in 116 s. What is its half-life? Using the chart on page 693, determine which is the most likely radio- active isotope

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