| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Radioisotopes | 100 | + | |
| 2 | Carbon Isotopes | 20 | + | |
| 3 | Iodine Isotopes | 12 | + | |
| 4 | Sulfur Isotopes | 9 | + | |
| 5 | Phosphorus Isotopes | 8 | + | |
| 6 | Oxygen Isotopes | 3 | + | |
| 7 | Sodium Isotopes | 3 | + | |
| 8 | Xenon Isotopes | 3 | + | |
| 9 | Calcium Isotopes | 2 | + | |
| 10 | Deuterium | 2 | + | |
| 11 | Iron Isotopes | 2 | + | |
| 12 | Nitrogen Isotopes | 2 | + | |
| 13 | Cobalt Isotopes | 2 | + | |
| 14 | Mercury Isotopes | 1 | + | |
| 15 | Zinc Isotopes | 1 | + |