A load-bearing bracket is used outdoors, where it is exposed to rain and air. A manufacturer is choosing between cobalt, a transition metal, and sodium, a Group 1 metal.
Explain why cobalt is more suitable for the bracket than sodium. Suggest one consequence for the bracket if sodium were used.
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.