A short radioactive decay chain involves two beta-minus emissions followed by one neutron emission. Compare the atomic number and mass number of the final nucleus with those of the nucleus at the start.
The atomic number is two higher and the mass number is one lower.
The atomic number is two higher and the mass number is unchanged.
The atomic number is unchanged and the mass number is one lower.
The atomic number is two lower and the mass number is one lower.
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.