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In this lesson, we will learn how to calculate the activity of a radioactive sample after a given amount of time using the sample's half-life.
Q1:
Carbon-14 has a half-life of 5 7 3 0 years. If a sample of carbon contains 200 carbon-14 atoms, how many carbon-14 atoms did it contain 2 8 6 5 0 years ago?
Q2:
Elizabeth wants to find out the half-life of a radioactive sample. She measures the activity of the sample over time, and her results are shown in the table. What is the half-life of the sample?
Q3:
Argon-41 has a half-life of 110 minutes. If a sample of argon contains 2 400 atoms of argon-41, how many atoms of argon-41 are left after five hours and thirty minutes?
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