A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life of 6.0 hours, how many milligrams of the technetium- 99m sample remains active 24 hours after the test?

Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter24: Nuclear Chemistry
Section: Chapter Questions
Problem 80A
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A 120-mg sample of technetium-99m is used for a
diagnostic test. If technetium-99m has a half-life of
6.0 hours, how many milligrams of the technetium-
99m sample remains active 24 hours after the test?
Transcribed Image Text:A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life of 6.0 hours, how many milligrams of the technetium- 99m sample remains active 24 hours after the test?
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