chemical reactions

12345678910
Across
  1. 1. the breakdown of a substance into 2 or more simple substances
  2. 4. if the energy released in a chemical reaction is primarily in the form of heat
  3. 7. when 1 element replaces another in a compound
  4. 8. a substance that prevents certain chemical reactions
  5. 9. when 2 or more substances combine in a chemical reaction to form another substance
  6. 10. an insoluble solid that forms when 2 ionic compounds in solution are combined
Down
  1. 2. a reaction that requires energy in the form of heat
  2. 3. in a chemical equation, the substances that react
  3. 5. #s in front of the symbols and formulas in an equation
  4. 6. a substance that speeds up a chemical reaction w/out itself being permanently changed