Astatine, At, is below iodine in Group 7.
Statement 1: Astatine is a solid at room temperature.
Statement 2: Astatine will displace iodine from potassium iodide solution.
Statement 3: Sodium astatide has the formula NaAt\mathrm{NaAt}NaAt.
Statement 4: Astatine is more reactive than iodine.
Which predictions are most likely to be correct?
1 and 3 only
1, 2 and 3 only
2 and 4 only
1, 3 and 4 only
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.