| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| principal quantum number simple definition | 1.01 | 0.7 | 9880 | 97 | 42 |
| principal | 0.72 | 0.7 | 537 | 82 | 9 |
| quantum | 1.34 | 0.7 | 3299 | 81 | 7 |
| number | 1.2 | 0.7 | 3952 | 89 | 6 |
| simple | 1.3 | 0.8 | 4319 | 35 | 6 |
| definition | 0.73 | 0.5 | 5537 | 90 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| principal quantum number simple definition | 0.62 | 0.2 | 536 | 98 |
