Explain why the first ionisation energies fall down the group.
Explain why there is an increase in the successive ionisation energies of fluorine.
State and explain the trend in the boiling points of the elements down Group VII in terms of intermolecular forces.
An interhalogen compound may be formed when iodine reacts with fluorine. It has $M_r = 222$ and a percentage composition by mass of F, $42.8$; I, $57.2$. Calculate the molecular formula of this interhalogen compound.
Another interhalogen compound has the formula $\text{ICl}$. Draw a ‘dot-and-cross’ diagram of a molecule of this compound, showing only the outer-shell electrons. Explain whether this molecule is expected to be polar.
Give the formulae for W, X, Y and Z.
Write an equation for the reaction between chlorine and hot $\text{NaOH(aq)}$.
State the oxidation numbers of chlorine at the beginning and at the end of the reaction in (ii).
Write an ionic equation for the reaction between Y and $\text{AgNO}_3\text{(aq)}$. Include state symbols.