chemical reactions

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