Matter

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Across
  1. 3. Anything that has mass and volume
  2. 4. He created a model of the atom
  3. 6. A pure substance made with with only one type of atom
  4. 7. The number of protons and neutrons added together
  5. 10. When a substance changes into a new substance
  6. 12. A positively charged particle of an atom
  7. 13. A physical property describing a substance's ability to be stretched into wire
  8. 14. Has a definite volume but not shape
  9. 15. Describes matter's ability to change into another substance
  10. 17. An atomic particle with no charge
  11. 18. A negatively charged particle of an atom
Down
  1. 1. A chemical property describing a substance's ability to burn
  2. 2. An arrangement of all known elements
  3. 5. Characteristic that can be observed without changing a substance
  4. 7. The number of protons in the nucleus
  5. 8. Does not have definite shape or volume
  6. 9. Chopping wood into smaller pieces is this type of change
  7. 10. It has 20 protons and is found in your teeth and bones
  8. 11. Has a definite shape and definite volume
  9. 16. The center of an atom