A student writes three statements about iron and steel.
Statement 1: pure iron is too soft for many uses because its layers of atoms slide over each other easily
Statement 2: in steel, atoms of different sizes distort the layers, so the layers slide over each other less easily
Statement 3: steel is harder than pure iron because the carbon atoms form strong covalent bonds that lock the iron layers in place
Which statements are correct?
2 only
2 and 3 only
1, 2 and 3
1 and 2 only
42 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.