![]() ![]() Explain that radioactive elements are made up of atoms with an unstable nucleus. Display the Radon-222 Decay Chain image.Start with a vocabulary activity if students are not familiar with radon and the terms used in this activity.Radon-222 Decay Chain (display or copy for students)Ĥ5-60 minutes, not including optional activities or extensions.Half-Life Data Sheet (one per student, pair or group) and Half-Life: Teacher Answer Key.Computer and projector for displaying information. ![]()
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