Potassium is higher in the reactivity series than calcium and reacts much more vigorously with water than calcium reacts with water.
State why potassium is higher in the reactivity series and reacts more vigorously than calcium, in terms of the number of electrons lost by each atom to form a stable ion.
110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.