Allotropes

Question 1

What does Graphite bond to

Answer 1

Each carbon covalently bonded to 3 others

Question 2

Graphite electrons

Answer 2

1 delocalised electron free to carry charge(electrodes)

Question 3

Graphite forces

Answer 3

Weak intermolecular forces between the layers, easily broken so layers slide( pencils, lubricant)

Question 4

Graphite melting point

Answer 4

High melting point because they have strong covalent bonds

Question 5

Graphite uses

Answer 5

Pencils ,lubricant ,electrodes

Question 6

Diamond bonds

Answer 6

Each carbon covalently bonded to 4 others

Question 7

Diamond conductivity

Answer 7

Doesn’t conduct electricity because there are no free electrons

Question 8

Why is diamond a hard substance

Answer 8

Because it has strong covalent bonds

Question 9

Diamond melting point

Answer 9

High melting point because strong covalent bonds require lots of energy to break

Question 10

Diamond uses

Answer 10

Jewellery, cutting tools

Question 11

Fullerences melting point

Answer 11

Low melting and boiling points because there are weak intermolecular forces between molecules

Question 12

Fullerenes covalent bond

Answer 12

Each carbon covalently bonds to 3 others

Question 13

What is fullerenes

Answer 13

Simple molecule

Question 14

Graphene properties

Answer 14

Single layer of graphite, 1 atom thick

Question 15

Why does graphene conduct across surfaces

Answer 15

Because of delocalised electrons

Question 16

Graphene covalent bonds

Answer 16

Each carbon covalently bonds to 3 others

Question 17

Graphene melting point

Answer 17

High melting point as strong covalent bonds require lots of energy to break

Question 18

Properties of metals

Answer 18

Conducts heat
Conducts electricity
Solid at room temperature because it has a very high melting point
Shiny
Malleable(can be shaped)
Ductile(can be drawn into wires)
Sonorous( ringing sound if hit)
Dense