Calculating Half-Life of Radioactive Elements

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Presentation transcript:

Calculating Half-Life of Radioactive Elements

All Radioactive elements have a known half-life

Equation used for calculating Half-Life

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?

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?

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?

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?

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 44.5 days. How much of a 2.000 mg sample will remain after 133.5 days?

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?

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 165.0 g sample remains after 90.0 minutes?