Question

A radioactive substance Technetium-99 is also used by physicians to examine blood flow to

specific organs and assess organ function or bone growth. It has a very short half-life of about 6

hours. The fraction of this material that would remain after 30 hours will be
a) 1/32

b) 1/5

c) 1/2

d) 4/5​

Answer 1

The congressional mandate for this study calls for an examination of the production of medical isotopes to include “molybdenum 99, iodine 131, xenon 133, and other radioactive materials used to produce radiopharmaceuticals for diagnostic and therapeutic procedures or for research and development.” However, the authoring committee determined that for the purposes of addressing the statement of task for this study (Sidebar 1.2), it is sufficient to focus on the production of the medical isotope molybdenum-99 (Mo-99). This is so because:

1.

The decay product of Mo-99, technetium-99m1 (Tc-99m), is used in about two-thirds2 of all diagnostic medical isotope

Answer 2

Answer:

1/32 is your answer mate .

all the best for Pisa exam ✌