B. Radioactivity and Half-Life Problem Solving and Evaluation (1) Calculating half-life from one piece of data using calculus CASE 1: Suppose a sample of radioisotope has an activity of 8,000Bq (counts per second). After 24 hours, the activity had dropped to 250Bq. Calculate the half-life (t 1/2) of the radioisotope. (2) Half-life calculation leading to prediction of future activity using calculus CASE 2: Suppose a sample of a radioisotope has an activity of 800Bq. What will be the activity after three half-lives have passed?
B. Radioactivity and Half-Life Problem Solving and Evaluation (1) Calculating half-life from one piece of data using calculus CASE 1: Suppose a sample of radioisotope has an activity of 8,000Bq (counts per second). After 24 hours, the activity had dropped to 250Bq. Calculate the half-life (t 1/2) of the radioisotope. (2) Half-life calculation leading to prediction of future activity using calculus CASE 2: Suppose a sample of a radioisotope has an activity of 800Bq. What will be the activity after three half-lives have passed?
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Transcribed Image Text:B. Radioactivity and Half-Life Problem Solving and Evaluation
(1) Calculating half-life from one piece of data using calculus
CASE 1: Suppose a sample of radioisotope has an activity of 8,000Bq (counts per second). After 24
hours, the activity had dropped to 250Bq. Calculate the half-life (t 1/2) of the radioisotope.
(2) Half-life calculation leading to prediction of future activity using calculus
CASE 2: Suppose a sample of a radioisotope has an activity of 800Bq. What will be the activity after
three half-lives have passed?
(3) Evaluate the validity of results on the application of half-life through calculation from one piece of
data or prediction of future activity.
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