A university outreach team is filming a high-speed video showcase demonstrating the periodic trends of the Group 1 (alkali) metals. They plan to film the reactions of lithium, sodium, and potassium with water, and use these observations to predict the chemical behavior of rubidium and caesium.
Describe the distinct physical observations for the reaction of lithium, sodium, and potassium with water, and explain the trend in their reactivity down the group in terms of atomic structure.
In your answer, you must also:
75 exam-style questions on Edexcel GCSE Chemistry 7.1 Group 1, covering 7.1.1 Classifying elements by group in the periodic table and 7.1.2 Properties and reactions of the alkali metals. Each one has a worked solution and a mark scheme showing where the marks go.