C2 Covelant Bonding

Question 1

Name 3 types of Covalent bonding with examples

Answer 1

Giant Covalent (Diamond, Silicone oxide, Graphite, graphene, Buckminsterfullerene)
Small molecules (water, methane, oxygen, nitrogen, carbon dioxide, amonia)
Large molecules (Polymers)

Question 2

What types of atoms bond covalently

Answer 2

2 non-metals

Question 3

Explain what electrons do in covalent bonding

Answer 3

Electrons are shared

Question 4

Giant covalent bonding characteristics

Answer 4

• High melting point due to strong covalent bonds requiring a lot of energy to overcome
• Solid at room temperature
• Will only conduct electricity if it has delocalised electrons (graphene)
• Hard if there are no layers, soft if there are layers

Question 5

Small covalent molecules characteristics

Answer 5

• low melting + boiling point due to weak intermolecular forces requiring little energy to overcome
• gas or liquid at room temperature

Question 6

Large covalent molecules characteristics

Answer 6

• melting + boiling points lower than giant covalent as the intermolecular forces are strong and require more energy than small covalent molecules to overcome.
• normally solid at room temperature