Chemical Reactions End-of-Unit Crossword

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Across
  1. 2. an ending substance that is made during a chemical reaction
  2. 3. something that can be observed about a substance such as color or smell
  3. 5. atomic structure with a neutral charge
  4. 6. last name of the French scientist who established the Law of Conservation of Matter
  5. 10. to change the order or position of something
  6. 15. the number of protons + number of neutrons in an atom
  7. 16. the number of protons/electrons in an atom
  8. 17. atomic structure with a negative charge
  9. 18. last name of a Russian scientist that formulated the first Periodic table
Down
  1. 1. something that is made of all the same atoms or groups of atoms
  2. 4. the center of an atom
  3. 7. type of electrons on the outermost electron shell
  4. 8. a starting substance that is part of a chemical reaction
  5. 9. atomic structure with a positive charge
  6. 11. the tiny pieces that all matter is made of
  7. 12. a group of atoms joined together in a particular way
  8. 13. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
  9. 14. last name of an English chemist who founded the Atomic Theory