Types of Substance (Edexcel GCSE Chemistry: Combined Science)

Substances can be classified into different categories depending on their properties. 

The structures of five substances are represented below:

Give one substance, A, B, C, D or E that:

Which element are substances B and E made from?

Substance C is methane, CH₄.

Tick (✓) two boxes that are correct about this substance.

Which of these properties does titanium have?

Figure 1 shows the structure of titanium.

Figure 1

What is X labelling?

Use Figure 1 to explain why titanium can conduct electricity.

Titanium is malleable.

Describe what this means.

Figure 1 shows the structure of diamond and graphite.

Figure 1

State one similarity between the structure of diamond and graphite.

State one way the structure of graphite is different to the structure of diamond.

Diamond is used as a cutting tool.

[1]

Which property do graphite and metals both have?

Poly(ethene) is a plastic used to make objects like plastic bags.

Use the correct words from the box to complete the sentence:

Plastics like poly(ethene) are  ………………… made up of linking together many small molecules called……………….

Figure 1 shows the structure of two giant covalent structures: graphene and buckminsterfullerene.

                                                   Graphene                                                            buckminsterfullerene

Figure 1

Buckminsterfullerene is also called C₆₀.

State why.

Graphene is very strong.

Use its structure to explain why.

In the future, graphene could be used for touchscreens on electronic devices.

Other than its strength, give one property that would make it ideal for this job.