| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| periodic system of elements | 1.8 | 0.8 | 3267 | 10 | 27 |
| periodic | 1.38 | 0.8 | 5469 | 83 | 8 |
| system | 1.93 | 0.3 | 1950 | 66 | 6 |
| of | 1.24 | 0.2 | 9635 | 56 | 2 |
| elements | 1.47 | 1 | 8213 | 73 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| periodic system of elements | 0.41 | 0.9 | 2940 | 26 |
