A detector records three separate nuclear decay events.
The table gives information about each nucleus before it decays and the particle recorded leaving the nucleus.
| Event | Mass number before decay | Atomic number before decay | Particle recorded |
|---|---|---|---|
| J | 38 | 17 | electron |
| K | 26 | 13 | positron |
| L | 5 | 2 | neutron |
Give the type of decay in event J.
Give the mass number and the atomic number of the daughter nucleus formed in event J.
Give the mass number and the atomic number of the daughter nucleus formed in event K.
Explain why the daughter nucleus formed in event L is the same element as the original nucleus but a different isotope.
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.