Across
- 4. An acid reacts with a base
- 5. depositing a layer of zinc on iron
- 6. occurs when two substances react chemically
- 7. Reactions accompanied with release of heat
- 9. Evolution of gas is confirmed by appearance of
- 10. Atoms are arranged in a regular pattern
Down
- 1. Involves addition of oxygen
- 2. Reacts with potassium
- 3. Reactions accompanied with absorption of heat
- 8. Involves addition of hydrogen