Nuclear physics | High school physics | Science | Khan Academy
When nuclei change, elements turn into different elements. Large amounts of energy are involved. Learn about radioactive decay, nuclear fusion, and nuclear fission. Discover important applications of these fascinating nuclear processes. **Unit guides are here!** Power up your classroom with engaging strategies, tools, and activities from Khan Academy’s learning experts. [**Doc**](https://bit.ly/3FJ5RqV) | [**PDF**](https://bit.ly/3XFa6dm)
Overview
Added
March 18, 2026
Subject & domain
physics · nuclear-physics
Grade range
Grade 9 (Freshman)–Grade 12 (Senior)
Page kind
Course
Introduction
Nuclear Physics Unit Overview
- Core Concept: Nuclear physics focuses on the transformation of elements when nuclei change, a process that releases significant amounts of energy.
- Key Topics Covered:
- Radioactive Decay: Includes alpha, beta, and gamma decay processes.
- Dating Methods: Principles of half-life and radiometric dating.
- Nuclear Reactions: Mechanisms and applications of nuclear fusion and nuclear fission.
- Assessment Structure:
- Two distinct quizzes covering specific sub-topics.
- A comprehensive unit test to evaluate overall understanding.
- Educational Resources: The unit provides instructional guides, practice exercises, and application-based learning tools for students and educators.
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