1.

State whether covalent substances conduct electricity, and explain why

Question 1 of 20

2. Why is the boiling point of a larger molecule higher than that of a smaller molecule?

Question 2 of 20

3. Why do ionic substance have high melting and boiling points?

Question 3 of 20

4. How can atoms get a full outer shell?

Question 4 of 20

5. Explain whether solid ionic compounds conduct electricity

Question 5 of 20

6. A student has drawn a diagram to show the structure of a metallic solid, but forgotten to label the parts. Which of the following correctly lists those parts?

Question 6 of 20

7. Explain why metals are good conductors of electricity

Question 7 of 20

8. Describe the formation of a covalent bond

Question 8 of 20

9. Explain, in terms of its structure, why graphite can act as a lubricant.

Question 9 of 20

10. In the dot and cross diagram of the outer electrons showing the covalent bonding of carbon dioxide (CO₂), how many electrons should be shown in areas 1, 2, 3 and 4?

Question 10 of 20

11. State the fomula for the two ions in iron (II) sulfide

Question 11 of 20

12. Give the definition of a covalent bond

Question 12 of 20

13. Explain what is meant by electric current

Question 13 of 20

14. Suggest why buckminsterfullerene, C₆₀, has a low melting point.

Question 14 of 20

15. Describe the bonding in a metal

Question 15 of 20

16. Alloys contain different sized positive ions. What properties does this give alloys compared to pure metals?

Question 16 of 20

17. When can ionic substances conduct electricity?

Question 17 of 20

18. What is a mixture of metals called?

Question 18 of 20

19. State a property that makes iron suitable for building

Question 19 of 20

20. Explain why nitrogen gas, N₂, is a gas at room temperature

Question 20 of 20