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Chapter 5: Q.5.76 (page 165)
If the amount of radioactive iodine-123, used to treat thyroid cancer, in a sample decreases from 0.4 mg to 0.1 mg in 26.4 h, what is the half-life of iodine-123?
The half-life of iodine-is
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Identify each of the following:
a.
b.
c.
d.
e.
Write a balanced nuclear equation for the beta decay of each of the following radioactive isotopes:
a. b.
c. d.
If the amount of radioactive phosphorus-, used to treat leukemia, in a sample decreases from to indays, what is the half-life of phosphorus-?
All the elements beyond uranium, the trans uranium elements, have been prepared by bombardment and are not naturally occurring elements. The first trans uranium element neptunium, , was prepared by bombarding with neutrons to form a neptunium atom and a beta particle. Complete the following equation:
data-custom-editor="chemistry"
The activity ofin a -kg human body is estimated to be. What is this activity in microcuries? (5.3)
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