Chemistry Revision

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Across
  1. 4. a ______ change doesn't create a new substance
  2. 5. nitric acid + lithium --> _______ + hydrogen
  3. 6. heat energy released
  4. 7. sulfate sulfuric acid + calcium --> _______ + hydrogen
Down
  1. 1. a ------ change forms a new substance
  2. 2. heat energy absorbed
  3. 3. hydrochloric acid + sodium --> _______ + hydrogen