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Calculating Half-Life of Radioactive Elements

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Presentation on theme: "Calculating Half-Life of Radioactive Elements"— Presentation transcript:

1 Calculating Half-Life of Radioactive Elements

2 All Radioactive elements have a known half-life

3 Equation used for calculating Half-Life

4 Lets practice calculating Half-life…
The half-life of Strontium-90 is 28 years. If you have 20 grams to start with, how much will you have left in 84 years?

5 The half-life of Chlorine-36 is 400,000 years
The half-life of Chlorine-36 is 400,000 years. If the sample was 8 grams to begin with, how much would be left after 300,000 years?

6 The half-life of Iodine-131 is 8. 07 days
The half-life of Iodine-131 is 8.07 days. If the sample was 50 grams to begin with, how much would be left after two weeks?

7 The half-life of Carbon-14 is 5730 years
The half-life of Carbon-14 is 5730 years. If the sample was 256 grams to begin with, how much would be left after 28,650 years?

8 Iron-59 is used in medicine to diagnose blood circulation disorders
Iron-59 is used in medicine to diagnose blood circulation disorders. The half life of iron-59 is days. How much of a mg sample will remain after days?

9 If the passing of five half lives leaves 25
If the passing of five half lives leaves 25.0 mg of a strontium-90 sample, how much was present at the beginning?

10 Technetium-104 has a half life of 18. 0 minutes. How much of a 165
Technetium-104 has a half life of 18.0 minutes. How much of a g sample remains after minutes?

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3.125%.

3.125%.
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