Exercise 3. Observe how a short-living radioactive material can survive in a decay chain. In the previous exercies it has been demonstrated that a material with decay constant 0.138 could not survive during 100 time steps. Enter the following values for the decay constants: 0.008 0.138 0.0 Run the simulation several times in “continuous mode”. Observe whether some of the nuclei with 0.138 decay constant will still remain after 100 time steps. Questions: On the basis of your experiments try to answer the following question: How can the radon (half-life: 3,825 days) cause the largest part of the natural radioactive dose? Should not it have to decay already a long time ago since the Earth was formed?

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