Describe what happens to a heavy atomic nucleus during an induced nuclear fission reaction, such as the fission of a uranium-235 ( 92235U^{235}_{\,\,92}\text{U}92235U) nucleus.
94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.