Across
- 7. used in modern medicine
- 10. oderless
- 11. discovered in 1791
- 13. main components in meteorites
- 14. too much can cause eating disorders
- 17. colorless
- 19. produces light
- 22. floats on water
- 23. Common in limestone
- 25. metalloid and semiconductor
- 26. 2% of it is in the earths crust
Down
- 1. breaks easily
- 2. makes up 80% of the atmosphere
- 3. 10% of mass in humans is hydrogen
- 4. greenish yellowish color
- 5. highly reactive
- 6. lightest metal
- 8. liquid at room temperature
- 9. named after coal
- 12. used in light tubes
- 15. does not rust
- 16. boiling point 3409
- 18. 2nd most abundant element in the earths core
- 20. Enhances eye sight
- 21. Toxic gas
- 22. it means moon
- 24. Essential for Human Nutrition
- 27. it can make you cry just like onions do