Across
- 2. (Component of table salt)
- 4. (Most reactive non-metal)
- 5. (Used in batteries)
- 7. (Heavy metal, once used in paints)
- 9. (Used in semiconductors)
- 10. (Noble gas in bulbs)
- 11. (Essential for breathing)
- 13. (Found in bones and teeth)
- 14. (Makes up 78% of air)
Down
- 1. (Disinfectant in water)
- 3. (Used in fireworks and medicine)
- 6. (Lightest element)
- 8. (Essential for nerve function)
- 12. (Used in bright signs)
- 13. (Found in all living organisms)