Unit 1 Nature of Matter

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Across
  1. 2. A substance made of only one type of atom
  2. 3. High‑energy state where atoms are ionized
  3. 5. Ability of a substance to burn
  4. 8. Mixture with visibly different parts
  5. 10. Smallest unit of an element that still has its properties
  6. 11. Temperature at which a solid becomes a liquid
  7. 12. Temperature at which a liquid becomes a gas
  8. 15. A combination of substances not chemically bonded
  9. 18. Characteristic of a substance that can be observed without changing it
Down
  1. 1. Mixture with evenly distributed parts
  2. 4. Anything that has mass and takes up space
  3. 5. Two or more elements chemically combined
  4. 6. Energy that increases particle motion when added
  5. 7. Mass per unit volume
  6. 9. Characteristic describing how a substance interacts with others
  7. 13. State where particles slide past each other
  8. 14. How easily a substance reacts with others
  9. 16. State where particles move freely and spread out
  10. 17. State of matter with tightly packed particles vibrating in place