Clue | Source | Date |
---|---|---|
Poisonous pale-yellow gas (8) | ||
Strange iron fuel chemical (8) | ||
Gas fitter's beginning in extension? | ||
Gaseous element | The Times Concise | 24 Feb 2020 |
Line four switched for nine on the periodic table | ||
Four-line whips, highly toxic stuff | ||
Element in Teflon | Newsday | 05 Jul 2018 |
The "F" element in CFC | LA Times Daily | 27 Mar 2018 |
The 'F' element in CFC | The Washington Post | 27 Mar 2018 |
Teflon ingredient | ||
Poisonous yellow gas | ||
Most reactive element | ||
Element #9 | ||
Tooth-saving chemical. |