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Uptake of Mineral Ions

Half life of ...

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Half life of Iodine 131 is 8.1 days . What is the activity of 0.8 mg of Iodine 131 A. 3.6 * 109 bq B. 4.98 * 1010 bq C. 9.85 1010 bq D. 9.85 109 vs

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Q. Iodine-131 is a radioactive isotope. If

1.0 m g

^{131} I

has an activity of

4.6 \times 10^{12} B q

. What is the half-life of

^{131} I

$^{131} I$ is an isotope of Iodine that $β -$ decays to an isotope of Xenon with a half-life of $8 days$ . A small amount of a serum labelled with $^{131} I$ is injected into the blood of a person. The activity of the amount of $^{131} I$ injected was $2.4 \times 10^{5} Becquerel (Bq)$ . It is known that the injected serum will get distributed uniformly in the blood stream in less than half an hour. After $11.5 hours, 2.5 ml$ of blood is drawn from the person's body, and gives an activity of $115 Bq$ . The total volume of blood in the person's body, in $liters$ is approximately _______.

$^{131} I$ is an isotope of Iodine that $β -$ decays to an isotope of Xenon with a half-life of $8 days$ . A small amount of a serum labelled with $^{131} I$ is injected into the blood of a person. The activity of the amount of $^{131} I$ injected was $2.4 \times 10^{5} Becquerel (Bq)$ . It is known that the injected serum will get distributed uniformly in the blood stream in less than half an hour. After $11.5 hours, 2.5 ml$ of blood is drawn from the person's body, and gives an activity of $115 Bq$ . The total volume of blood in the person's body, in $liters$ is approximately _______.

Q. A patient undergoing treatment for thyroid cancer receives a dose of radioactive iodine

(^{131} I)

, which has a half-life of

8.05

days. If the original dose contained

12 m g

^{131} I

, calculate the mass of

^{131} I

16.1

Q. As a result of being exposed to the radiation released during the Japan nuclear accident in every recent recent Sunami, the dose if iodine-131 in a person's body is 7.4 mCi

(1 m C i = 1 \times 10^{- 3} C i)

. Calculate the number of atome of iodine-131

(T_{50} = 8.1 d a y s)

.

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