An iron oxide has the formula Fe2O3\text{Fe}_2\text{O}_3Fe2O3. Each oxide ion in it carries a charge of 2−2-2−. What is the charge on each iron ion in this oxide?
3+3+3+
4+4+4+
6+6+6+
2+2+2+
91 exam-style questions on AQA GCSE Chemistry 1.3 Properties of transition metals, covering 1.3.1 Comparison with Group 1 elements and 1.3.2 Typical properties of transition metals. Each one has a worked solution and a mark scheme showing where the marks go.