Across
- 4. Weak acid found in vinegar
- 6. Reacts vigorously with water, producing sparks and a purple-pink flame
- 8. Chemical reaction in which a substance reacts rapidly with oxygen and gives off heat
- 9. Weak base found in cleaning products
- 11. Strong acid found in the stomach
- 16. A measure of how readily an element participates in reactions
- 18. Base that can dissolve in water
- 19. Paper or solution that can turn a range of colours depending on the pH
- 20. Turns milky white in the presence of carbon dioxide
- 22. Dye that has a different colour in acids and bases
Down
- 1. A thin layer of non-reactive chromium is placed over steel or iron
- 2. Listed on the left of the arrow in a chemical equation
- 3. Paper or solution that turns pink with an acid
- 5. Chemical reaction that requires energy to occur
- 6. Solution that turns pink when mixed with a base
- 7. Strong acid found in car batteries
- 10. A process where a metal is damaged or weakened by a chemical reaction
- 12. Elements known as semi-metals
- 13. A form of corrosion involving iron
- 14. Burns with a bright white light
- 15. Iron is coated with a layer of more reactive zinc
- 17. The compound formed when a substance reacts with oxygen
- 21. Chemical reaction that gives off energy (heat or light)