1.1. This question is about the structure and bonding in ethene. 

Ethene belongs to the homologous series of alkenes and has the formula  C₂H₄.

Complete the dot and cross diagram in Figure 1 to show the bonding of ethene.

Only show the outer shell electrons. 

Figure 1

1.2. Table 1 shows information on the boiling points and structures of ethene and two other alkenes.

Table 1 

Name	Ethene	Propene	Butene
Structure
Boiling Point in oC	-104	-47	-6.3

Use your knowledge of structure and bonding to describe and explain the trend in boiling point as the number of carbon atoms increases.

1.3. Ethene can undergo addition polymerisation to form the polymer poly(ethene).

Why is poly(ethene) a solid at room temperature?

1.4. Complete the structure for poly(ethene) in Figure 2. 

Figure 2