Chemistry of radioactive dating
The first lesson, Isotopes of Pennies, introduces the idea of isotopes.The final lesson, Frosty the Snowman Meets His Demise: An Analogy to Carbon Dating, is based on gathering evidence in the present and extrapolating it to the past.After students have completed the activity, discuss the answers to the analysis questions with the whole class.Also, return to the questions you asked in the introduction to the lesson and allow students to revise their answers.To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay.This is the second lesson in a three-lesson series about isotopes, radioactive decay, and the nucleus.
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Advise students to read through the simulation first so that they understand what they should do.If they haven't changed their answers, ask them to explain why.
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