Chemical Reactions and Equations

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Across
  1. 4. reaction where light causes the breakdown of a subtance
  2. 5. acid-metal reactions are ________ reactions
  3. 6. a substance which turns from green to white when heated
  4. 10. a substance that undergoes a chemical change in a reaction
  5. 14. brown gas produced during the decomposition of lead nitrate
  6. 15. substance that speeds up a chemical reaction
  7. 16. during a double displacement reaction, _____ are exchanged
  8. 17. CaO + H20 is a ______ reaction (exothermic/endothermic)
Down
  1. 1. an insoluble solid formed during a double displacement reaction
  2. 2. gas evolved when an acid reacts with a metal
  3. 3. a reaction where two reactants combine to form a single product
  4. 7. common name of calcium hydroxide
  5. 8. bags of chips are usually filled with _________ gas
  6. 9. corrosion and rancidity are _______ reactions
  7. 11. a magnesium ribbon burns in _____ colour
  8. 12. most reactive metal
  9. 13. 2Mg+O2 = 2MgO is a _______ reaction