Matter Matters!

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Across
  1. 7. pure substance made of only one type of atom
  2. 8. energy of particles in motion
  3. 10. atomic particle having a positive charge
  4. 11. center of an atom
  5. 12. downward curve of liquid in graduated cylinder
  6. 13. combination of at least two atoms
  7. 14. atomic particle having a negative charge
  8. 15. units for measuring mass
  9. 17. path on which an electron travels
Down
  1. 1. energy of motion
  2. 2. anything having mass and volume
  3. 3. atomic particle having a neutral charge
  4. 4. energy of an object in a position
  5. 5. combination of at least two different atoms
  6. 6. units for measuring volume
  7. 9. amount of space something occupies
  8. 13. amount of matter something contains
  9. 16. building block of all matter