A computer simulation follows a nucleus with mass number 150 and atomic number 64. The nucleus emits three times. Each emission is alpha, beta-minus, beta-plus, gamma or neutron radiation.
The simulation identifies one emission as an alpha particle but does not identify the other two.
| quantity for all three emissions | value |
|---|---|
| total mass number carried away | 5 |
| total charge number carried away | +1 |
Explain which two emissions were not identified by the simulation.
The daughter nucleus then emits a positron. Give the mass number and atomic number of the nucleus after this emission.
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.