| Clue | Source | Date |
|---|---|---|
| Erroneously, icon bid on connection between chemical units (5,4) | ||
| Investment for a physicist? | New York Times | 26 Aug 2020 |
| The linkage in NaCl, for one (... first 3) | Universal | 23 Mar 2020 |
| Common salt has one run away from wry secret agent | The Telegraph Toughie | 24 Jun 2016 |
| *Chemical connection that involves a transfer of electrons |