Unit Plan
CK-12 Foundation

Ck 12: Radioactive Half Life

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Explains radioactive half-life and radioactive dating, and demonstrates how to solve problems with each.
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Physics Aviary

Physics Aviary: Practice Problems: Decay Constant and Half Life From Table

For Students 9th - 10th
Determine the decay constant and half-life of an isotope based on the activity data of the isotope as a function of time.