High School / Chemistry


Students model radioactive decay to determine the half-life of a “radioactive” sample.

Supports NGSS Performance Expectation HS-PS1-8: Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.


Student Files

19A_answer_sheet.docx 183.98 KB
19A_Half_Lives.docx 676.54 KB
19A_Half_Lives.pdf 463.76 KB
19A_answer_sheet.pdf 176.03 KB
19A_Half_Lives_Google_Slide.pdf 31.40 KB

Teacher Files

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Source: Lab #19A

Essential Chemistry Teacher Lab Manual