Interpretation: The question is to find how technetium-99m is produced, the meaning of the letter m at the end of its name, and how it is used in bone imaging.
Concept Introduction: Nuclear waste contains technetium-99 as one of its constituent parts. A quick-acting variant of Tc-99 called technetium-99m is employed as a diagnostic tool in medicine. It does not linger in the body or the environment for very long and has a short half-life of six hours.
Answer to Problem 97A
Technetium-99m is produced by the bombardment of Molybdenum-98.
Explanation of Solution
Given information:
The radioactive isotope technetium-99m is given.
Molybdenum-98 is subjected to neutron bombardment in order to make technetium. When molybdenum-98 absorbs a neutron, molybdenum-99 is created.
With a half-life of 65.94 hours, molybdenum-99 decays into technetium-99 via beta disintegrate.
The yield of technetium-99 produced by uranium-235 thermal neutron fission is 6.0507%.
Produced from molybdenum-99, the metastable technetium-99m is a nuclear isomer with a short half-life (approximately 6 hours) that is employed in nuclear medicine.
For the examination of osteomyelitis, tc-99m methylene diphosphonate (MDP) is one of the preferred agents. This substance is utilized in triple-phase bone scanning.
It is intravenously administered, and for 30 seconds, flow/perfusion examinations of the afflicted region are taken at a rate of one picture per second.
‘m’ signifies the metastable state of the radionuclides.
Hence, Technetium-99m is produced by the bombardment of Molybdenum-98.
Chapter 25 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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