Gabby's Chapter 11/12 choice board

123456789101112131415
Across
  1. 2. made of two or more atoms joined together
  2. 4. any characteristic of matter that you can observe or measure without changing it into a new substance
  3. 7. two or more substances that are evenly mixed
  4. 9. any change that causes a new substance to form
  5. 10. change in which no new substances are formed
  6. 12. two or more substances that are not evenly mixed
  7. 14. negatively charged particle
  8. 15. building blocks of matter
Down
  1. 1. center of an atom
  2. 3. anything that has mass and takes up space
  3. 5. describes how a substance reacts
  4. 6. positively charged particle
  5. 8. combination of two or more substances
  6. 11. particle with no charge
  7. 13. made of only one kind of atom