| Clue | Source | Date |
|---|---|---|
| Chemical link with two pairs of shared electrons, or what each starred answer forms | Wall Street Journal | 08 Sep 2025 |
| Molecular link with two pairs of electrons shared by two atoms | LA Times Daily | 04 Apr 2017 |
| Molecular link with two pairs of electrons shared by two atoms | The Washington Post | 04 Apr 2017 |
| Kind of molecular link |