chemical reactions

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Across
  1. 3. Products are always carbon dioxide and water
  2. 4. Smaller reactants have greater_______________,making it easier for them to react
  3. 7. Two or more simple substances combine to form a more complex product
  4. 9. magnesium + zinc sulfate magnesium sulfate + zinc
  5. 10. Higher_______________provide more energy for the systems in which reactants react
Down
  1. 1. lead(II) nitrate and potassium iodide to form potassium nitrate and lead iodide
  2. 2. For following chemical reaction: calcium + bromine ---> calcium bromide, the reactants are_______________
  3. 5. __________ is always a reactant in a combustion reaction
  4. 6. A single compound breaks down into two or more elements or new compounds
  5. 8. For the following chemical reaction: zinc + iron sulfate ---> zinc sulfate + iron, the products are___________