Matter

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