Allotropes of Carbon - Structure and Bonding

Question 1

What is the formula for diamond?

Answer 1

C

Question 2

What is the formula for buckministerfullerene?

Answer 2

C₆₀

Question 3

What is the formula for graphite?

Answer 3

C

Question 4

What is the formula for graphene?

Answer 4

C

Question 5

Diamond, buckministerfullerene, graphite and graphene all have high melting and boiling points. True or False

Answer 5

False - buckministerfullerene has a low melting an boiling point

Question 6

Which 2 allotropes are conductors?

Answer 6

Graphite and graphene

Question 7

Which 2 allotropes are insulators?

Answer 7

Buckministerfullerene and diamond

Question 8

How many covalent bonds does diamond have?

Answer 8

4

Question 9

How many covalent bonds does buckministerfullerene have?

Answer 9

90

Question 10

How many covalent bonds does graphite have?

Answer 10

3

Question 11

How many covalent bonds does graphene have?

Answer 11

3

Question 12

Why does diamond have a high melting and boiling point?

Answer 12

It has very strong covalent bonds - needs a lot of energy to break

Question 13

Why does graphite have a high melting and boiling point?

Answer 13

The strong covalent bonds that hold the carbon atoms together in the layers require a lot of energy to break.

Question 14

Why does graphene have a high melting and boiling point?

Answer 14

Strong covalent bonds require lots of energy to break

Question 15

Why does buckministerfullerene have a low melting and boiling point?

Answer 15

There are weak intermolecular forces between molecules that require little energy to break

Question 16

Describe the strength of diamond

Answer 16

Very hard - 4 bonds form a rigid structure

Question 17

Describe the strength of graphite

Answer 17

Soft and slippery - layers can slip off easily which is why it’s used in pencils

Question 18

Describe the strength of buckministerfullerene

Answer 18

Soft and brittle

Question 19

Describe the strength of graphene

Answer 19

Very strong

Question 20

Which 4 of the allotropes of carbon has a low melting and boiling point?

Answer 20

Buckministerfullerene

Question 21

Why is graphite soft and slippery?

Answer 21

It has a layered structure and the bond is broken easily because there are no covalent bonds and weak intermolecular forces between the layers.

Question 22

Why is graphene very strong?

Answer 22

It has very strong covalent bonds which require lots of energy to break - it is also arranged in a giant lattice.

Question 23

Why can graphite be used as a lubricant?

Answer 23

It has weak forces between molecules which means layers can slip easily

Question 24

What are fullerenes

Answer 24

Allotropes of carbon, made by bending sheets of graphene into hollow structures.