Two containers hold nickel compounds. Their labels read nickel(II) oxide and nickel(III) oxide. What information do the Roman numerals give?
The charge on the oxide ions in each compound
The number of nickel atoms in each compound
The number of elements present in each compound
The charge on the nickel ions in each compound
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.