question. Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half- life of cesium-137 is 30.2 years. How much time is required for the activity of a sample of cesium-137 to fall to 13.8 percent of its original value? Submit Answer yrs A Retry Entire Group 8 more group attempts remaining
Use the References to access important values if needed for this question. Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells What is the half-life of chromium-51 if 61.3 days are required for the activity of a sample of chromium-51 to fall to 21.6 percent of its original value? days Submit Answer 8 more group attempts remaining Retry Entire Group
Use the References to access important values if needed for this question. Thallium-201 is used medically to diagnose heart problems. The half-life of thallium- 201 is 72.9 hours. How much time is required for the activity of a sample of thallium-201 to fall to 12.5 percent of its original value? hrs Submit Answer 8 more group attempts remaining Retry Entire Group
Use the References to access important values if needed for this Use the References to access important values if needed for this question. Cesium-137 is part of the nuclear waste produ
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