Across
- 2. used for fuel
- 3. neutral,found in nucleus
- 5. a chart that organizes all known chemical elements
- 8. with a positive electric charge in nucleus
- 10. columns on Periodic table
- 12. definite shape and volume
- 13. mass of a single atom
- 15. rows on Periodic table
- 18. anything with mass and volume
- 19. the things on the periodic table
- 20. the electrons in the outermost shell of an atom
Down
- 1. liquid into gas
- 4. negatively charged particles
- 6. building block of all matter
- 7. no definite shape but definite volume
- 9. the number of protons in the nucleus of an atom
- 11. gas changes into liquid
- 14. solid to liquid
- 16. liquid to solid
- 17. state of matter that is like an electrically charged gas