| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| rydberg constant by element | 0.44 | 0.7 | 4243 | 50 | 27 |
| rydberg | 0.62 | 0.2 | 4727 | 7 | 7 |
| constant | 0.37 | 0.5 | 2541 | 34 | 8 |
| by | 1.11 | 0.9 | 2986 | 38 | 2 |
| element | 0.87 | 0.2 | 3013 | 27 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| rydberg constant by element | 0.72 | 0.6 | 4354 | 49 |
