Across
- 4. poisonous,used in x-rays
- 5. 75% of the air
- 8. reacts with oxygen and rusts
- 9. used in laundry additive
- 10. needed as a vitamin for immune system
- 12. component of water
- 13. green gas, used in lights
- 14. used in medicine
- 19. burns with a brilliant scarlet red
- 20. metalloid
Down
- 1. very flammable
- 2. used in toothpaste, highly reactive
- 3. lights
- 6. wash off area of surgery with it
- 7. component of every living thing
- 11. pennies, reddish brown
- 15. urns bright, used in fireworks
- 16. used for plating cheaper metals
- 17. found in bananas
- 18. needed in diet but too much could be harmful