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Chapter 5: Q. 5.83 (page 166)

A 64-渭颁颈sample of Tl-201decays to 4.0渭Ciin 12days. What is the half-life, in days, of Tl-201?(5.3,5.4)

Short Answer

Expert verified

As a result, a half-life of Tl-201=3.0days.

The TI-201has a 3.0days half-life.

Step by step solution

01

    Introduction

Half-life:

A half life is the time it takes for half of a radioactive sample to decay. .In 12days, the TI-201sample drops from 64.0渭颁颈to 4.0渭颁颈.

Calculate the number of half-lives required to reduce the sample size from 64.0渭Cito 4.0渭颁颈.

02

    Explanation

64.0渭颁颈TI-201鈫�1half-life32.0渭颁颈TI-201鈫�2half-lives16.0渭颁颈TI-201鈫�3half-lives8.0渭颁颈TI-201鈫�4half-lives4.0渭颁颈TI-201

To reduce the Tl-201sample from 64.0渭Cito 4.0渭Ci, four half-lives are required.

03

   Conclusion

Calculate the half-life of TI-201as follows:

4half-livesfor(TI-201)=12days

1half-lifeofTI-201=3.0days

As a result, a half-life of Tl-201=3.0days.

The TI-201has a 3.0day half-life.

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Most popular questions from this chapter

A vial contains radioactive iodine- 131with an activity of localid="1653999160871" 20mCl/ml. If a thyroid test requires localid="1653999165943" 3.0mCiin an "atomic cocktail." how many milliliters are used to prepare the iodine-131solution?

Write the atomic symbol for each of the following isotopes used in nuclear medicine:
a.copper-64
b. selenium-75
c. sodium-24
d. nitrogen-15

One of the most recent trans uranium elements, oganesson-294(Og-294), atomic number 118, was prepared by bombarding californium-249with another isotope. Complete the following equation for the preparation of this new element: (5.2)

data-custom-editor="chemistry" ?+Cf98249鈫�Og118294+3n01

The activity of K-40in a70.-kghuman body is estimated to be 120nCi. What is this activity in becquerels?(5.3)

Write the atomic symbol for each of the following isotopes used in nuclear medicine:
a.indium-111
b. data-custom-editor="chemistry" palladium-103
c. data-custom-editor="chemistry" barium-131
d. data-custom-editor="chemistry" rubidium-82
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