Which statement about spontaneous fission is correct?
It happens to an unstable nucleus once each second
It happens rarely, without a neutron being absorbed
It happens after a gamma ray has been absorbed
It happens when a nucleus emits an alpha particle
40 exam-style questions on AQA GCSE Physics 4.4 Nuclear fission and fusion, covering 4.4.1 Nuclear fission and 4.4.2 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.