5.78 Cesium-137, used in cancer treatment, has a half-life of 30 yr. (5.2, 5.4) a. Write the balanced nuclear equation for the beta decay of cesium-137. b. How many milligrams of a 16-mg sample of cesium-137 remain after 90 yr? c. How many years are required for 28 mg of cesium-137 to decay to 3.5 mg of cesium-137?
5.78 Cesium-137, used in cancer treatment, has a half-life of 30 yr. (5.2, 5.4) a. Write the balanced nuclear equation for the beta decay of cesium-137. b. How many milligrams of a 16-mg sample of cesium-137 remain after 90 yr? c. How many years are required for 28 mg of cesium-137 to decay to 3.5 mg of cesium-137?
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter18: Nuclear Reactions
Section: Chapter Questions
Problem 43QAP
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