Unit 3

Question 1

Describe and explain the melting point of giant ionic substances [3]

Answer 1

• High melting point
• Because it has a strong electrostatic force of attraction between oppositely charged ions.
• That requires a lot of energy to overcome.

Question 2

Describe and explain the melting point of simple covalent substances [3]

Answer 2

• Small molecules
• Weak intermolecular forces
• That requires a small amount of energy to overcome

Question 3

Describe and explain the melting point of giant metallic substances [3]

Answer 3

• High melting point
• because of the strong electrostatic force of attraction between the positive metal ion and delocalized electrons.
• The require a lot of energy to overcome

Question 3

Describe and explain the melting point of giant covalent substances [3]

Answer 3

• High melting point
• Because lots of strong covalent bonds
• That require a lot of energy to overcome