Science Cross Word Puzzle

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Across
  1. 4. Chemical Reactions and The Law of Conservation of Mass
  2. 6. The Periodic Table and its Trends
  3. 7. Nuclear Chemistry
Down
  1. 1. transition Phases of Matter and Gas Laws
  2. 2. Parts of an Atom
  3. 3. Chemical Solutions
  4. 5. Chemical Bonding