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