| Aktiva substanser | Betyg | Bibliogr. | Expandera | |
|---|---|---|---|---|
| 1 | Kalciumradioisotoper | 100 | + | |
| 2 | Kolradioisotoper | 83 | + | |
| 3 | Tritium | 75 | + | |
| 4 | Jodradioisotoper | 73 | + | |
| 5 | Kadmiumradioisotoper | 36 | + | |
| 6 | Radioaktiva spårämnen | 36 | + | |
| 7 | Järnradioisotoper | 23 | + | |
| 8 | Zinkradioisotoper | 21 | + | |
| 9 | Yttriumradioisotoper | 19 | + | |
| 10 | Kvicksilverradioisotoper | 18 | + | |
| 11 | Svavelradioisotoper | 17 | + | |
| 12 | Kväveradioisotoper | 17 | + | |
| 13 | Ceriumradioisotoper | 16 | + | |
| 14 | Fluorradioisotoper | 16 | + | |
| 15 | Indiumradiosotoper | 15 | + | |
| 16 | Galliumradioisotoper | 15 | + | |
| 17 | Fosforradioisotoper | 14 | + | |
| 18 | Syrgasradioisotoper | 12 | + | |
| 19 | Strontiumradioisotoper | 12 | + | |
| 20 | Talliumradioisotoper | 8 | + | |
| 21 | Koboltradioisotoper | 7 | + | |
| 22 | Iridiumradioisotoper | 6 | + |