Chemical Reactions

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Across
  1. 4. Large number written in front of elements in a formula
  2. 6. A substance formed when 2 or more elements or compounds are mixed together but not bonded
  3. 9. Substances that you start with that change in a chemical reaction
  4. 10. A substance formed when 2 or more elements are chemically bonded together
  5. 11. A reaction that releases more energy than it uses (hot)
  6. 12. States that the mass of the reactants equals the mass of the products
  7. 13. A substance that changes its form or phase but remains the same substance
Down
  1. 1. When different substances combine to form new substances
  2. 2. Contains just one type of atom
  3. 3. A reaction that absorbs more energy than it releases (cold)
  4. 4. A substance that changes into a completely different substance with different properties
  5. 5. A solid that is produced in a chemical reaction
  6. 7. New substances that result from a chemical reaction
  7. 8. Small number written after an element symbol