This resource provides an engaging and structured approach to understanding nuclear reactions, focusing on both fission and fusion processes. It includes a checklist for balancing equations, examples, and practice problems that require students to identify mass numbers, ensure conservation of mass, and solve for missing elements in nuclear equations. The material emphasizes the importance of the Law of Conservation of Mass through practical applications and challenges students to think critically about balancing equations. Additionally, it incorporates tasks such as finding a mystery isotope, enhancing investigative skills in nuclear science.