Across
- 3. Chemical name for soap.
- 6. Water that contains a lot of Ca and Mg
- 7. Elements have a unique colour of light due to this.
- 8. Element made to investigate the speed of a reaction.
- 10. Factor that affects the speed of a chemical reaction.
- 13. Plastic was made from this protein in milk.
- 14. Famous example of Carbon-14 dating
- 15. Oil used in the making of soap.
- 16. Chemical symbol for table salt.
- 18. Use of elements having a different colour when burnt.
- 19. Green in colour in a flame.
- 20. Crimson in colour in a flame.
Down
- 1. Instrument used to measure acidity of indigestion remedies.
- 2. Process of making soap.
- 4. Added to milk to form plastic.
- 5. Smell of the element made in recent experiment to investigate speed of reaction.
- 9. Acid used to test rocks for hardness.
- 11. Different form of same element.
- 12. Speeds up a reaction.
- 13. Use of carbon isotope.
- 15. Element that causes hardness in water.
- 17. Element that can be found in water but is toxic.