Chemical Reactions

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Across
  1. 3. A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
  2. 5. the chemical reactions in which one component each of both the reacting molecules is exchanged to form the products.
  3. 7. Something produced by human or mechanical effort or by a natural process.
  4. 8. direct combination reaction is one of the most common types of chemical reactions.
  5. 10. with the symbol Cu.
  6. 12. a substance that takes part in and undergoes change during a reaction.
  7. 13. the action or process of precipitating a substance from a solution.
Down
  1. 1. is a pyrotechnic composition of metal powder fuel and metal oxide.
  2. 2. breaking down of mass.
  3. 4. is a type of oxidation-reduction chemical reaction when an element or ion moves out of one compound and into another.
  4. 6. principle of mass conservation.
  5. 9. a substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together.
  6. 11. something done, felt, or thought in response to a situation or event.