Crossword Puzzle

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Across
  1. 2. Any of the basic unit of matter and energy
  2. 5. Large number at beginning of a chemical formula
  3. 7. 2 or more molecules reacting with one another
  4. 9. The basic unit of a chemical element
  5. 10. Substances that are around at the beginning of a reaction
  6. 12. A particle smaller than an Atom
  7. 14. A force of Attraction that holds atoms together
  8. 15. The smallest unit of a compound
  9. 17. A substance made of atoms that are all the same
  10. 19. The Atoms center
Down
  1. 1. Something way bigger on earth than moon
  2. 2. The scale on which you can decide whether or not a substance is an acid or a base.
  3. 3. can not be divided
  4. 4. Characteristic of a substance that is observed physically
  5. 6. Render
  6. 8. How much matter a substance has
  7. 11. To the lower right of an element
  8. 13. cloud Used to describe where electrons are
  9. 16. A subatomic particle
  10. 18. To push back or away by a force