| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Transition Elements | 100 | + | |
| 2 | Lanthanoid Series Elements | 98 | + | |
| 3 | Metals, Rare Earth | 98 | + | |
| 4 | Metals, Heavy | 97 | + | |
| 5 | Metalloids | 81 | + | |
| 6 | Boron | 70 | + | |
| 7 | Chalcogens | 13 | + | |
| 8 | Noble Gases | 11 | + | |
| 9 | Carbon | 11 | + | |
| 10 | Elements, Radioactive | 9 | + | |
| 11 | Arsenic | 3 | + | |
| 12 | Metals, Alkaline Earth | 2 | + |