Chapter 3 (States of Matter) and Chapter 4 (Atomic Structure)

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Across
  1. 3. system releases energy to the surroundings
  2. 7. substance changes from a gas directly to a solid
  3. 8. state of matter-definite volume, no definite shape
  4. 10. atoms of the same element with different number of neutrons
  5. 12. substance changes from a solid to a liquid
  6. 13. substance changes from a liquid to a gas
  7. 16. positively charged subatomic particle
  8. 17. state of matter-low level of kinetic energy and fixed volume
  9. 18. state of matter-high level of kinetic energy and variable shape
Down
  1. 1. subatomic particle with mass so small it is insignificant
  2. 2. substance changes from a liquid to a solid
  3. 4. substance changes from a gas to a liquid
  4. 5. system absorbs energy to the surroundings
  5. 6. substance changes from a solid directly to a gas
  6. 9. __ level: possible energy that electrons of an atom have
  7. 11. subatomic particle found in nucleus with protons
  8. 14. __ number: the number of protons in an atom
  9. 15. __ number: the number of protons and neutrons in an atom