| Answer | Crossword Clue |
|---|---|
| GASES | Hydrogen and helium |
| GASES | Helium and hydrogen |
| GAS | Hydrogen or helium |
| ELEMENT | Helium or hydrogen |
| ELEMENT | Hydrogen or helium |
| GAS | Helium or hydrogen |
| ATNO | 1 for hydrogen or 2 for helium: Abbr. |
| Answer | Crossword Clue |
|---|---|
| GASES | Hydrogen and helium |
| GASES | Helium and hydrogen |
| GAS | Hydrogen or helium |
| ELEMENT | Helium or hydrogen |
| ELEMENT | Hydrogen or helium |
| GAS | Helium or hydrogen |
| ATNO | 1 for hydrogen or 2 for helium: Abbr. |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.