Across
- 3. symbol NA
- 4. H2O
- 6. is a tiny particle but bigger than bacteria
- 7. symbol H
- 9. are pure substances that cannot be changed
- 10. heat and electricity move though them easier
- 11. heavy for their size
- 12. is the number that comes before the chemical formula
- 13. are composed of more than one element
- 15. ability to be drawn into a wire
- 17. not shiny
- 18. is a long whip like structure
Down
- 1. having a shiny surface of reflecting light brightly
- 2. break or shatter easily
- 5. are composed of two or more different substance
- 8. heat and electricity do not move through them easily
- 12. pure substance
- 13. atomic number 17
- 14. ability to be hammered into different shapes
- 16. are tiny hair like stricter