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 ____