| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| principal quantum number definition | 0.71 | 0.6 | 3748 | 24 | 35 |
| principal | 1.64 | 0.2 | 2964 | 79 | 9 |
| quantum | 1.29 | 0.8 | 2674 | 76 | 7 |
| number | 0.91 | 0.4 | 4513 | 53 | 6 |
| definition | 0.88 | 1 | 9759 | 40 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| principal quantum number definition | 1.6 | 0.1 | 4918 | 96 |
