Science Challenge It Crossword

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Across
  1. 2. Vertical line in the periodic table
  2. 6. Anything that has weight and takes up space
  3. 8. Law that says matter cannot be created nor destroyed
  4. 9. Horizontal line in the periodic table
  5. 10. The smallest unit of matter
Down
  1. 1. Elements/molecules before a reaction
  2. 3. 2 or more atoms bonded together
  3. 4. 2 or more different atoms bonded together
  4. 5. An equation where no mass was created or destroyed
  5. 7. Elements/molecules after a reaction