State the way $\text{Cl}_2$ is used in water purification.
Construct the equation for the first ionisation energy of chlorine, and include state symbols.
Explain why the first ionisation energies of the Period 3 elements generally rise.
State and explain how the thermal stabilities of the hydrogen halides, $\text{HX}$, compare.
Complete the table to show sulfur’s oxidation number in each sulfur-containing product.
Explain why different sulfur-containing products form when each of these halide ions reacts with concentrated $\text{H}_2\text{SO}_4$.
State the meaning of disproportionation.
Write an equation for the reaction between $\text{Cl}_2$ and cold aqueous sodium hydroxide.
Draw a diagram showing all of the bond types present in $\text{Al}_2\text{Cl}_6(g)$.
Describe what you would observe when solid aluminium chloride reacts with water. Name the type of reaction that happens.
Suggest the bonding and structure shown by $\text{ZCl}_n$.
Calculate the value of $n$ for $\text{ZCl}_n$.
Give the name of the mechanism for this reaction.
State the essential condition needed for the initiation step to occur.
Give the electronic configuration of $\text{Cl}\!\cdot$.
Identify the products formed in the step labelled propagation 2.
Name the type of reaction shown in the final step.
Suggest the identity of another organic molecule produced when $\text{CH}_3\text{Cl}$ reacts with $\text{Cl}_2$ under the same conditions.