Give your chemistry students a focused look at half life calculations with ninety questions built for real classroom use, whether you are starting a new unit or reviewing before a test.
Students will answer questions such as "After 3 half-lives, how much of a 64 mg sample remains?", "If a substance has a half-life of 7 years, how much of a 200 g sample will remain after 21 years?", and "If a sample of Carbon-14 has a half-life of 5730 years, how much remains after 11460 years?"
Each worksheet reviews the same core ideas from a different angle. Use them across a week or unit so students see the material three times without it ever feeling repetitive.
This set is part of a complete NGSS aligned chemistry unit. The unit also covers Nuclear Reactions, Radioactive Decay Types, Fission and Fusion, Nuclear Equations, Isotopes and Stability, and Radiation Detection, all in the same three worksheet format, so your classroom routine stays familiar while the topic changes.
Suitable for Grade 9-12 chemistry classes, and for NGSS aligned review at any point in the school year. This set is aligned to NGSS standard HS-PS1-8.
