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ICP. Half-Life Centsium Lab 10/1/12. Warmup. Which is more stable? A sample with a half-life of one day, or a sample with a half-life of one week? Write an equation for the beta decay of thorium-234.

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**ICP**Half-Life Centsium Lab 10/1/12**Warmup**• Which is more stable? A sample with a half-life of one day, or a sample with a half-life of one week? • Write an equation for the beta decay of thorium-234. • How many half-lives must a radioactive sample go through before it is at 25% of its original amount?**Agenda**• CentsiumLab • Time to work on half-life problems worksheet • Homework: “Half-Life Problems” Worksheet from Friday**Centsium Lab Pointers**• Keep adding your decayed to the number of decayed before. • Do not lose pennies. A missing penny is one point off your group’s lab grade. • Lay out your pennies in two 5x5 squares before putting them up at the end, so that I can check that you have them all.

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