Using the kinetic particle model, describe how the particles in bromine are arranged and how they move when bromine is a liquid and when it is a gas.
Molten potassium bromide can be electrolysed using the apparatus shown. On the diagram, label the anode and the electrolyte. Predict the products of this electrolysis at the positive electrode and the negative electrode. Give one observation that is made at the positive electrode. Suggest why the electrodes are made of graphite and not of magnesium.
Aqueous potassium bromide reacts with aqueous chlorine. Complete the word equation for this reaction. Using ideas about the reactivity of the halogens, explain why aqueous potassium bromide does not react with aqueous iodine. Describe what you would observe when aqueous silver nitrate is added to aqueous potassium bromide.