Which is the correct Lewis structure for ethene?

A

There were four G2 comments on this question all of which stated that some of the Lewis structures for ethane were not represented clear enough, particularly in relation to choice C, which is a valid comment and this will be taken on board in future paper settings. In the case of choice A one respondent stated that it would have been better to represent the carbon to carbon double bond in the Lewis structure as C:::C instead of having the electrons shown in a vertical line. However, candidates should realise that electrons in Lewis structural representations can be represented in a variety of ways and hence teachers should ensure that students in class get ample practice of writing Lewis structures in different ways.