tv0 ptsestion 23 of 24 >기© Macmillan LearningОResources? HintSubmit AnswerThe half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0 µg, calculate the number ofdays it will take for the mass to be reduced to 3.00 μg.time:x10TOOLSSEP3days

The half-life of a radioactive substance is the time it takes for half of the atoms in a sample to…

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Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter18: Nuclear Chemistry

Section: Chapter Questions

Problem 18.ACP

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The isotope S3890r one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 y. Calculate the half-life.
Fluorine-18 is a radioactive isotope that decays by positron emission to form oxygen-18 with a half-life of 109.7 min. (A positron is a particle with the mass of an electron and a single unit of positive charge; the equation is F918O188+e+10 Physicians use 18F to study the brain by injecting a quantity of ?uoro-substituted glucose into the blood of a patient. The glucose accumulates in the regions where the brain is active and needs nourishment. (a) What is the rate constant for [lie decomposition of ?uorine-18? (b) If a sample of glucose containing radioactive fluorine-18 is injected into the blood, what percent of the radioactivity will remain after 5.59 h? (c) How long does it take for 99.99% of the 18F to decay?

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tv 0 pts estion 23 of 24 > 기 © Macmillan Learning О Resources ? Hint Submit Answer The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0 µg, calculate the number of days it will take for the mass to be reduced to 3.00 μg. time: x10 TOOLS SEP 3 days