This resource contains 14 practice questions. Four questions are based on interpreting dot-and-cross diagrams for ionic compounds and focuses on students explaining, in terms of electrons, how atoms react. The other ten questions are additional examples of simple covalent molecules that students could be asked to apply their knowledge of completing dot-and-cross diagrams to, for example hydrogen sulphide, iodine, silicon tetrahydride, ethane etc. These resources are provided in label format with 4 identical questions per sheet. These can be printed simply on A4 paper or can alternatively be printed on 4 per sheet labels and used as a diagnostic question for homework or to reinforce key concepts before the final exam.