Substance X X\,X is a solid at room temperature (298 K) and has a giant ionic lattice structure.
Which row in the table shows the properties that substance X X\,X is most likely to have?
| Row | Melting point (K\text{K}K) | Electrical conductivity as a solid | Electrical conductivity when molten |
|---|---|---|---|
| A | 324 | Good | Good |
| B | 1074 | Poor | Good |
| C | 1074 | Poor | Poor |
| D | 324 | Poor | Good |
Row A
Row B
Row C
Row D
59 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.