| Aktiva substanser | Betyg | Bibliogr. | Expandera | |
|---|---|---|---|---|
| 1 | Kolradioisotoper | 100 | + | |
| 2 | Tritium | 80 | + | |
| 3 | Jodradioisotoper | 49 | + | |
| 4 | Fluorradioisotoper | 44 | + | |
| 5 | Cesiumradioisotoper | 29 | + | |
| 6 | Fosforradioisotoper | 14 | + | |
| 7 | Svavelradioisotoper | 13 | + | |
| 8 | Radioaktiva spårämnen | 8 | + | |
| 9 | Xenonradioisotoper | 8 | + | |
| 10 | Natriumradioisotoper | 7 | + |