Across
- 2. substance that cleans pools
- 3. positive charge
- 5. the lightest of all metals
- 8. makes up about 0.025 percent of Earth's crust
- 10. chemical element with symbol O and atomic number 8.
- 12. electronics,electronics, automotive industry
- 13. comes from salt
- 17. inside balloon
- 19. Negatively charged ions
- 20. to power commercial nuclear reactors
Down
- 1. number puts the element in order and is the same as
- 2. in pennies
- 4. electrodes, heating elements and field emitters,
- 6. named after a cooking utensil
- 7. a hardening agent for platinum.
- 9. mass how much a element weights
- 11. a metal in jewelry
- 14. in quarters
- 15. negative charge
- 16. prosthetics, tennis rackets, goalie masks
- 18. drilling fluid