C2.3

Question 1

Can diamond conduct electricity? why/why not? (2 marks)

Answer 1

No, because each carbon atom is bonded to 4 others, meaning there are no delocalised electrons

Question 2

Are nanoparticles good catalysts, if so why? (2 marks)

Answer 2

Yes. This is because they have a very high surface area to volume ratio

Question 3

Why can graphite conduct electricity?

Answer 3

Because it has delocalised electrons between its layers.

Question 4

What is the formula of buckminsterfullerene?

Answer 4

C60

Question 5

State two applications of fullerenes

Answer 5

Catalysts in chemical reactions

Delivery of medicines around the body

Question 6

Diamond and graphite are … molecular structures

Answer 6

Diamond and graphite are examples of giant covalent molecular structures.

Question 7

Write down one property of graphite that explains why it is used as a lubricant.

Answer 7

It has layers that are able to slide over each other

Question 8

Why does diamond have a high melting point

Answer 8

it has many strong covalent bonds (4 for every carbon atom)

Question 9

Why can diamond not conduct electricity (2 marks)

Answer 9

Each carbon atom in diamond has 4 bonds meaning that there are no delocalised electrons to carry charge