Across
- 1. What happened when you burn malachite?
- 5. Which one on the periodic table has the number 29?
- 6. Which one on the periodic table has the number 26?
- 7. All that bonding with atoms make this?
- 10. What did carbon dioxide and iron make?
- 12. What is the name for pure carbon?
- 14. Which metal doesn't bond well with gold?
- 15. Are always in the elements?
- 16. What type of copper was formed as weapons?
- 19. Which form of copper was produced first?
- 20. Which one on the periodic table has the number 13?
Down
- 2. What did copper do in Egyptian times as surgical utensils?
- 3. What are the positive atoms?
- 4. The most beautiful metal is?
- 8. What weakness metals after you are done smelting it?
- 9. What element mixed with tin and copper create this?
- 11. What are the negative atoms?
- 13. What is invisible to people's eyes?
- 17. Which one of these elements was mixed with steel?
- 18. What is the name of this combination of metal and rubber?