Structure and Bonding for dual award IGCSE

I have a melting point of 1600^oC

I do not conduct electricity in any state.

what type of structure and bonding do I have?

• giant ionic

• giant covalent

• molecular ionic

• molecular covalent

I am a gas at room temperature.

What kind of structure and bonding do I have ?

• giant ionic

• giant covalent

• molecular ionic

• molecular covalent

I am a solid that does not conduct electricity.

My melting point is 560^oC

When molten I do conduct electricity

What type of structure and bonding do I have?

• giant ionic

• giant covalent

• molecular ionic

• molecular covalent

Carbon dioxide, CO₂, is a gas at room temperature but silicon dioxide, SiO_2, is a high melting point solid.

What is the explanation for this.

• the inter-molecular forces in CO₂ are weaker than the inter-molecular forces in SiO₂

• the inter-molecular forces in CO₂ are weaker than the covalent bonds in SiO₂

• the covalent bonds in CO₂ are weaker than the covalent bonds in SiO₂

• the covalent bonds in CO₂ are weaker than the ionic bonds in SiO₂

Two forms of carbon are described:

A. has a melting point of 4000^oC and conducts electricity when solid.

B. has a melting point of 280^oC and does not conduct electricity.

What are the names of these two forms of carbon?

• A. diamond

  B. graphite

• A. diamond

  B. fullerene C₆₀

• A. graphite

  B. fullerene C₆₀

• A. graphite

  B. diamond

Two forms of carbon are described:

A. has a melting point of 4000^oC and conducts electricity when solid.

B. has a melting point of 280^oC and does not conduct electricity.

What are the names of these two forms of carbon?

• A. diamond

  B. graphite

• A. diamond

  B. fullerene C₆₀

• C. graphite

  B. fullerene C₆₀

• A. graphite

  B. diamond

I have a melting point of 847^oC and I conduct electricity when dissolved in water.

Why do I conduct electricity when dissolved.

• I have delocalised electrons that are free to move

• I have ions that are free to move in solution

• I have atoms that are free to move in solution

• I have molecules that are free to move in solution

What os my name?

• Diamond

• Graphite

• Graphene

• Buckminster fullerene

What is my name?

• Diamond

• Graphite

• Graphene

• Buckminster fullerene

What is my name?

• Diamond

• Graphite

• Graphene

• Buckminster fullerene