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The chart below shows the decay of a 100 g sample of radon gas (Radon-222). Use the chart to answer the following. What is the half-life of radon-222 gas? How much is left after 17.1 days? How much has decayed after 38 days? How many days would it take for the sample to be 1/32 𝑡ℎ of its activity at the beginning of the experiment?