Across
- 1. has mass and takes up space
- 3. chemical formula for water
- 6. change in _____ is an indicator of chemical reaction
- 7. positively charged subatomic particle
- 9. exothermic reactions _____ bonds
- 13. change that produces a new substance
- 17. an insoluable solid in a liquid solution
- 18. releases energy
- 19. endothermic reactions ____ bonds
Down
- 2. number of protons in an element
- 4. smallest unit of matter
- 5. chemical formula for carbon dioxide
- 8. absorbs energy
- 10. group of atoms bonded together
- 11. chemical formula for salt
- 12. evaporating water is a ______ change
- 14. neutrally charged subatomic particle
- 15. burning wood is a ______ change
- 16. negatively charged subatomic particle