Iron forms two different chlorides, FeCl2\mathrm{FeCl_{2}}FeCl2 and FeCl3\mathrm{FeCl_{3}}FeCl3.
What does this show?
Chlorine forms ions with different charges.
Iron forms compounds that are coloured.
Iron forms ions with different charges.
Iron acts as a catalyst in reactions.
60 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.