Across
- 2. Lightest noble gas
- 4. Salt component
- 5. Bright light gas
- 6. Greenish halogen gas
- 8. Light metal used in fireworks
- 9. Common metal in foil
Down
- 1. Found in all living things
- 2. The first element
- 3. Third element, used in batteries
- 7. Essential for breathing