Chemistry

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Across
  1. 2. a characteristic of a substance
  2. 8. a subatomic particle with a negative charge
  3. 9. a subatomic particle with no charge
  4. 10. the number of protons or electrons
Down
  1. 1. a change that results in a new substance
  2. 3. a subatomic particle with a positive charge
  3. 4. substances that can't be broken down into a simpler form
  4. 5. horizontal rows on the periodic table
  5. 6. how compact a substance is
  6. 7. columns of elements on the periodic table