Metal M forms two different oxides, MO\mathrm{MO}MO and M2O3\mathrm{M_{2}O_{3}}M2O3.
The oxide ion is O2−\mathrm{O^{2-}}O2−.
Statement 1: M is likely to be a transition metal.
Statement 2: M forms M2+\mathrm{M^{2+}}M2+ ions and M3+\mathrm{M^{3+}}M3+ ions.
Statement 3: M is likely to have a low melting point and a low density.
Statement 4: M is likely to be in Group 2, because it forms the oxide MO\mathrm{MO}MO.
Which statements are correct?
1 and 2 only
1, 2 and 3 only
2 and 4 only
1 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.