An entry in a nuclear data file describes a three-stage decay chain. Two stages are alpha decays and the remaining stage is a beta-minus decay. How do the numbers of protons and neutrons in the final nucleus compare with those in the parent nucleus?
It has three fewer protons and five fewer neutrons.
It has four fewer protons and four fewer neutrons.
It has five fewer protons and three fewer neutrons.
It has four fewer protons and five fewer neutrons.
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.