Across
- 2. Nuclear radiation that cannot penetrate paper.
- 3. Property of the nucleus that increases when beta particles are emitted.
- 6. The unit of radioactive activity.
- 8. The unwanted presence of radioactive material.
Down
- 1. Electromagnetic radiation from the nucleus of an atom.
- 4. The time taken for number of radioactive nuclei to halve.
- 5. The process of exposing a material to radiation.
- 6. Negatively charged nuclear radiation..
- 7. A random process by which nuclei become stable.
- 9. Uncharged particles that can be emitted from the nucleus.