Magnesium bromide can be prepared by the reaction of magnesium metal with bromine.
The table below shows some properties of magnesium, bromine, and magnesium bromide.
| Substance | Relative melting point | Electrical conductivity when solid | Electrical conductivity when molten |
|---|---|---|---|
| Magnesium | High | Good | Good |
| Bromine | Low | Poor | Poor |
| Magnesium bromide | High | Poor | Good |
Explain, in terms of bonding and structure, why the properties of the product, magnesium bromide, are different from the properties of the reactants, magnesium and bromine.
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.