| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Transition Elements | 100 | + | |
| 2 | Metals, Heavy | 86 | + | |
| 3 | Metals, Light | 33 | + | |
| 4 | Carbon | 25 | + | |
| 5 | Metals, Rare Earth | 21 | + | |
| 6 | Lanthanoid Series Elements | 18 | + | |
| 7 | Metals, Alkaline Earth | 17 | + | |
| 8 | Halogens | 13 | + | |
| 9 | Noble Gases | 10 | + | |
| 10 | Chalcogens | 5 | + | |
| 11 | Metalloids | 4 | + | |
| 12 | Phosphorus | 2 | + | |
| 13 | Metals, Alkali | 1 | + |