A nucleus found in natural rock has mass number 212 and atomic number 83. It changes in two steps into a stable nucleus with mass number 208 and atomic number 82. One emission comes from the nucleus at each step.
Which two emissions produce this change?
an alpha particle and a beta-minus particle
an alpha particle and a beta-plus particle
an alpha particle and a gamma ray
a beta-plus particle and a gamma ray
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.