 |
| |||
| radon A radioactive gaseous element emitted naturally from rocks and minerals where radioactive elements are present. It is released in non-coal mines, e.g. tin, iron, fluorspar, uranium. Radon is an alpha particle emitter as are its decay products and has been indicted as a cause of excessive occurrence of lung cancer in uranium miners. Concern has been expressed at radon levels in some housing usually adjacent to granite rocks or old tin mining regions | |||
| |||
| radium emanation; emanon | |||
| niton | |||
| radon | |||
|
radon : 12 phrases, 8 sujets |
| Communications | 2 |
| Électronique | 1 |
| Environnement | 1 |
| Général | 1 |
| Mathématiques | 1 |
| Sciences de la Terre | 3 |
| Soins de santé | 1 |
| Technologie | 2 |