An alpha decay leaves the daughter nucleus in an excited state. The daughter nucleus then emits gamma radiation.
Which change occurs inside the daughter nucleus as it emits the gamma radiation?
two protons and two neutrons are emitted together
the protons and neutrons move into a lower-energy arrangement
one neutron changes into a proton and an electron is emitted
one proton changes into a neutron and a positron is emitted
120 exam-style questions on Edexcel GCSE Physics 6.3 Nuclear equations and decay, covering 6.3.1 Beta-minus and beta-plus decay, 6.3.2 Effects of decay on the nucleus, and 6.3.3 Balancing nuclear equations. Each one has a worked solution and a mark scheme showing where the marks go.