This article analyzes the impact of using interactive simulations in teaching the topic of radioactivity on students’ learning outcomes. Modern educational technologies, particularly computer-based and online simulations, make it possible to visualize complex theoretical processes, conduct experiments in a safe environment, and develop students’ independent thinking skills. Research results show that interactive simulations improve students’ understanding of radioactivity, increase their level of comprehension, enhance interest in the subject, and effectively transform theoretical knowledge into practical skills and competencies.