Matter

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Across
  1. 1. The part of an atom with no charge
  2. 4. A property that does not depend on the amount of substance, like density
  3. 6. The state of matter with the highest energy particles
  4. 8. A positively charged particle in the nucleus of an atom
  5. 13. A gas that behaves according to the kinetic molecular theory
  6. 14. The process where a gas turns into a liquid
  7. 16. The process of a solid turning directly into a gas
  8. 17. A mixture that has uniform composition throughout
  9. 18. The smallest unit of an element
  10. 20. The state of matter with a definite shape and volume
Down
  1. 2. A pure substance that cannot be broken down further
  2. 3. The resistance of a liquid to flow
  3. 5. A measure of how much space an object occupies
  4. 7. A solid solution of metals, like steel
  5. 9. The temperature at which a liquid becomes a gas
  6. 10. The ability to be drawn into wires
  7. 11. The energy of motion
  8. 12. A substance made of two or more elements chemically combined
  9. 15. A property describing how light is reflected from a surface
  10. 19. The amount of matter in an object