Radioactive tracers are used to study ion transport across cell membranes. The b
ID: 2186090 • Letter: R
Question
Radioactive tracers are used to study ion transport across cell membranes. The beta-minus emitting isotope 42K (t1/2 = 12.4 h) has been particularly important for measuring the movement of potassium ions. A saline solution that contains the isotope bathes cells in a test tube, and the amount of 42K that has accumulated inside the cells is measured after a short time. A sample of liquid extracted from the cells must have an activity of at least 50 Bq for an accurate measurement to be made. The activity of a sample just after extraction is 500,000 Bq. If a scientist wishes to confirm the result by measuring the sample a week later, how much activity will remain?= Bq
Can an accurate measurement be made from the sample that is extracted a week after the initial extraction? (One Submission)
No
Yes
Explanation / Answer
Yes it can be.
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