Chemical Reactions Crossword

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Across
  1. 3. the relative size of things
  2. 6. a group of atoms joined together in a particular way
  3. 7. a starting substance that is part of a chemical reaction
  4. 9. an ending substance that is made during a chemical reaction
  5. 10. something that is made of all the same atoms or groups of atoms
Down
  1. 1. to change the order or position of something
  2. 2. letters and numbers showing the types and number of atoms that repeat to make up a substance
  3. 4. something that can be observed about a substance, such as color, smell, or boiling point
  4. 5. a process in which atoms rearrange to form new substances
  5. 8. the tiny pieces that all matter is made of