The nucleus of a hydrogen atom is a proton. The mass of a proton is mmm and the size of the charge on a proton is eee. Complete the table. Express your answers in terms of mmm and eee. Three spaces have already been completed.
| Particle or emission | Mass | Charge |
|---|---|---|
| proton | mmm | eee |
| neutron | mmm | |
| β−\beta^{-}β− particle (electron) | 000 (negligible) | |
| nucleus of helium-3 (23He^{3}_{2}\text{He}23He) |
Industrial laboratories and medical facilities use various radioactive isotopes for testing and diagnostics. Describe how these radioactive sources are handled, used, and stored in a safe way to minimize exposure to personnel.
170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.