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Posted: **Thu Jul 07, 2022 1:52 pm**

: Use The References To Access Important Values If Needed For This Question Cesium 137 Is Part Of The Nuclear Waste Produ 1 (96.76 KiB) Viewed 49 times

: Use The References To Access Important Values If Needed For This Question Cesium 137 Is Part Of The Nuclear Waste Produ 2 (103.75 KiB) Viewed 49 times

: Use The References To Access Important Values If Needed For This Question Cesium 137 Is Part Of The Nuclear Waste Produ 3 (100.37 KiB) Viewed 49 times

Use the References to access important values if needed for this 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