INTEGRATED SCIENCE REVIEW

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Across
  1. 1. the number of electrons on the outside of an atom
  2. 5. a model that tells us how many electrons there are and in what shells
  3. 6. a combination of two or more elements
  4. 7. a reaction that absorbs energy
  5. 10. a state of matter with changing volume and shape
  6. 12. type of variable that is the result
  7. 14. a mixture that has elements that can be separated physically
  8. 18. neutrally charged particles
  9. 19. a bond that involves sharing electrons among metals
  10. 21. a structure that tells us the valence electrons
  11. 22. positive charged particles
  12. 23. an element that has lost or gained an electron
Down
  1. 1. something we can change in an experiment
  2. 2. what we compare our variables to
  3. 3. going from a gas to a liquid
  4. 4. a bond that involves sharing electrons
  5. 8. going from a gas to a solid
  6. 9. a physical property that tells us how much matter is in something
  7. 11. a testable prediction
  8. 13. a reaction that releases energy
  9. 15. a state of matter with fixed volume and shape
  10. 16. a bond that involves giving and taking electrons
  11. 17. Something that cannot be broken down even further
  12. 20. a mixture where things are dissolved