Giant covalent substances - Edexcel

1

Which of the following has a giant covalent structure?

2

What structure is shown in the diagram?

Covalent structure of diamond

3

Why does silicon dioxide have such a high melting point?

4

Why is graphite useful for pencil leads?

5

What type of structure do both diamond and graphite have?

6

Why is diamond used to coat metal drill bits?

7

Which of these is a covalent molecular structure?

8

Why does graphite conduct electricity?

9

Which of the following could have a molecular formula of C60?

10

Approximately how many carbon atoms might be linked together in a polymer molecule?