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Across
  1. 2. property Property describing a substance’s reactivity
  2. 3. theory Idea that all matter is made of atoms
  3. 5. State of matter made of charged particles
  4. 7. change Change that does not form a new substance
  5. 10. Discovered the nucleus
  6. 11. State of matter with definite volume but no fixed shape
  7. 13. State of matter with fixed shape and volume
  8. 15. change Change that produces a new substance
  9. 16. Amount of space an object occupies
  10. 18. Force of gravity on an object’s mass
  11. 20. Developed modern atomic theory
  12. 23. mixture Unevenly mixed substance
Down
  1. 1. property Property observed without changing identity
  2. 4. of matter Physical form of a substance
  3. 6. Substance being dissolved
  4. 8. Developed quantum mechanical model of the atom
  5. 9. A uniform mixture of two or more substances
  6. 12. First proposed the concept of the atom
  7. 13. Substance that dissolves another
  8. 14. Proposed electrons orbit the nucleus in shells
  9. 15. of mass Matter cannot be created or destroyed
  10. 17. Amount of matter in an object
  11. 19. State of matter with no fixed shape or volume
  12. 21. Discovered the electron
  13. 22. Mass per unit volume of a substance