| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| he2 he2+ | 0.72 | 0.1 | 2439 | 52 |
| bond order of he2 molecule is he2 | 1.51 | 0.7 | 5419 | 25 |
| he2+ is stronger than he2 because | 1.36 | 0.8 | 1423 | 13 |
| he2+ exists and he2 does not | 0.4 | 0.4 | 5090 | 70 |
| bond order of he2 + | 1.11 | 0.8 | 1058 | 18 |
| bonding order of he2 | 0.15 | 0.2 | 7643 | 86 |
| he2 2+ bond order | 1.71 | 0.9 | 4775 | 12 |
| bond order of he2 + ion | 1.37 | 0.3 | 1784 | 49 |
| he 2 bond order | 0.89 | 0.7 | 8751 | 37 |
