Chemistry Revision

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Across
  1. 3. Reaction that absorbs energy
  2. 7. Reaction that releases energy
  3. 8. Given as the symbol "H"
  4. 9. energy The energy required for a reaction to proceed
Down
  1. 1. A way of speeding up a reaction
  2. 2. A measure of how fast a reaction is
  3. 4. The reaction between a more reactive metal and a less reactive metal solution.
  4. 5. AB + CD --> AD + CB, where one product is a solid
  5. 6. A negative ion