| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Metals, Heavy | 100 | + | |
| 2 | Transition Elements | 78 | + | |
| 3 | Metals, Rare Earth | 24 | + | |
| 4 | Metals, Alkaline Earth | 22 | + | |
| 5 | Elements, Radioactive | 20 | + | |
| 6 | Lanthanoid Series Elements | 20 | + | |
| 7 | Carbon | 18 | + | |
| 8 | Chalcogens | 15 | + | |
| 9 | Metalloids | 10 | + | |
| 10 | Halogens | 9 | + | |
| 11 | Hydrogen | 8 | + | |
| 12 | Metals, Alkali | 8 | + | |
| 13 | Actinoid Series Elements | 6 | + | |
| 14 | Noble Gases | 3 | + | |
| 15 | Metals, Light | 2 | + | |
| 16 | Boron | 2 | + | |
| 17 | Nitrogen | 2 | + | |
| 18 | Arsenic | 1 | + |