| Rating | Solver | Clue |
|---|---|---|
| HELIUM | Gaseous element, symbol He | |
| NEON | Gaseous element, symbol Ne | |
| OXYGEN | A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight ... | |
| FLUORINE | A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it ... | |
| HYDROGEN | A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence it... | |