Chemical Reactions

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Across
  1. 1. A solid that forms from a solution during a chemical reaction.
  2. 7. combination
  3. 8. A system in which no matter is allowed to enter or leave
  4. 10. A reaction that releases energy in the form of heat
  5. 12. Energy needed to get a reaction started
  6. 13. the process by which one or more substances change to produce one or more different substances
  7. 14. A substance that slows down or stops a chemical reaction
  8. 15. A chemical substance that is present at the start of a chemical reaction
  9. 16. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
  10. 17. the principle stating that matter is not created or destroyed during a chemical reaction
Down
  1. 2. A reaction in which energy is absorbed
  2. 3. A reaction in which one element replaces another in a compound or when two elements in different compounds trade places
  3. 4. A system in which matter can enter from or escape to the surroundings.
  4. 5. The elements or compounds produced by a chemical reaction.
  5. 6. A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
  6. 9. A chemical reaction that breaks down compounds into simpler products.
  7. 11. substance that speeds up the rate of a chemical reaction