Chemical reactions

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Across
  1. 5. it gives out heat during the reaction
  2. 7. the elements reacting together in a chemical reaction
  3. 8. this reactions needs heat to occur
  4. 10. magnesium(Mg) + oxygen(O2)
Down
  1. 1. something that helps speed up a chemical reaction
  2. 2. magnesium(Mg) + chloride(Cl) (magnesium ___)
  3. 3. a revesible reaction
  4. 4. the result when iron(Fe) reacts with water(H2O) and oxygen(O2)
  5. 6. carbon(C) + oxygen(O2) (___ dioxide)
  6. 9. a chemical reaction forms a chemical..