Across
- 2. a negatively charged particle
- 6. materials mixed together
- 7. what we end with
- 9. atoms bonded together
- 13. reaction where clouds form
- 14. a particle with no charge
- 17. chemicals combine in specific amounts
- 19. the number of protons in the nucleus of an atom
Down
- 1. a positive particle
- 3. a property of a substance that is observed during a chemical reaction
- 4. a chemist who developed the periodic table of the chemical elements
- 5. a substance that cannot be broken down into simpler substances
- 7. you can experience with your 5 senses
- 8. mass of an atom
- 10. smallest part of any element
- 11. materials does change
- 12. materials dont change
- 15. mixture is the same
- 16. a table of elements
- 18. materials we start with