Which statement correctly compares the ions formed by sodium and by iron?
Iron forms only +1 ions, but sodium can form ions with different charges.
Sodium and iron both form ions with only one charge.
Sodium and iron can both form ions with different charges.
Sodium forms only +1 ions, but iron can form ions with different charges.
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.