Particle Chemistry Crossword

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Across
  1. 2. Fixed volume, but not fixed shape
  2. 7. Negative subatomic particle
  3. 10. Transforming liquid state to gas state
  4. 11. Positive subatomic particle
  5. 13. Related to how quickly the particles are moving
  6. 15. Neutral subatomic particle
Down
  1. 1. Lightest element in the universe
  2. 3. The mass per unit volume
  3. 4. Metric temperature unit where absolute zero is 0
  4. 5. Basic building block of the universe
  5. 6. Fixed volume and fixed shape
  6. 8. Neither fixed volume, nor fixed shape
  7. 9. Smallest subdivision of a certain material
  8. 12. This is related to the force gas exerts on an area
  9. 14. The amount of space something takes up