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

Question 1 of 20

2. What does the word malleable mean?

Question 2 of 20

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

Question 3 of 20

4. What is needed to complete this diagram to show the ionic bonding in magnesium chloride, MgCl₂ ?

Question 4 of 20

5. Describe the structure of metals

Question 5 of 20

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

Question 6 of 20

7. Give the definition of a covalent bond

Question 7 of 20

8.

State whether covalent substances conduct electricity, and explain why

Question 8 of 20

9. 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 9 of 20

10. Describe the formation of a covalent bond

Question 10 of 20

11. Explain why methane gas, CH₄, is a gas at room temperature

Question 11 of 20

12. State 3 properties that makes aluminium suitable for power cables

Question 12 of 20

13. Do ionic substances conduct electricity?

Question 13 of 20

14. Why are alloys harder than pure metals?

Question 14 of 20

15. Why is the melting point of a smaller molecule lower than that of a larger molecule?

Question 15 of 20

16. What is an alloy?

Question 16 of 20

17. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of nitrogen (N₂), how many electrons should be shown in areas 1, 2 and 3?

Question 17 of 20

18. Explain, in terms of its structure, why graphite can conduct electricity.

Question 18 of 20

19. Explain what is meant by electric current

Question 19 of 20

20. Explain whether solid ionic compounds conduct electricity

Question 20 of 20