Draw a labelled diagram to illustrate the bonding in magnesium metal.
Fig. 2.1 illustrates some reactions of magnesium and its compounds. Identify the other products of reactions 1 and 2.
Reaction 3 is used to make a precipitate of $\text{Mg(OH)}_2$ from $\text{MgCl}_2\text{(aq)}$. State why $\text{Ca(OH)}_2\text{(aq)}$ would not produce a precipitate of $\text{Ba(OH)}_2$ from $\text{BaCl}_2\text{(aq)}$.
State the type of reaction that occurs in reaction 4.
$1\text{ cm}^3$ of $\text{MgCl}_2\text{(aq)}$ is placed in a test-tube. A few drops of $\text{AgNO}_3\text{(aq)}$ are added, followed by $1\text{ cm}^3$ of dilute $\text{NH}_3\text{(aq)}$. State in full what is observed in this experiment.
When $1\text{ cm}^3$ of $\text{MgCl}_2\text{(aq)}$ is added to $1\text{ cm}^3$ of $\text{Br}_2\text{(aq)}$ in a test-tube, the solution remains orange. Explain this observation.