Chemistry Review

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Across
  1. 2. This group is fairly reactive.
  2. 6. An element with a name that is very similar to a student's name in this class.
  3. 9. Outermost
  4. 10. A ____ change is difficult to reverse.
  5. 11. A noble gas.
  6. 13. This group number contains elements with four valence electrons.
  7. 14. The element with 20 electrons.
  8. 16. An example of this type of mixture is pizza.
  9. 19. Mass divided by volume equals what?
  10. 20. Positive subatomic particle.
Down
  1. 1. Atomic mass - atomic number.
  2. 3. Some element symbols appear funny because they were named in this language.
  3. 4. The last name of the scientist who first proved atoms exist.
  4. 5. Where an element has more than one atomic mass.
  5. 7. The only transition metal that is a liquid at room temperature.
  6. 8. This group is very reactive (2 words).
  7. 12. Salt is an example of what type of matter?
  8. 15. An example of this type of mixture is liquid glue.
  9. 17. The only part of the atom that moves.
  10. 18. Changing state, like from a solid to a liquid, results in an increase of this.