Caesium reacts extremely vigorously with water to form caesium hydroxide and hydrogen gas.
2Cs(s)+2H2O(l)→2CsOH(aq)+H2(g) 2\text{Cs(s)} + 2\text{H}_2\text{O(l)} \rightarrow 2\text{CsOH(aq)} + \text{H}_2\text{(g)} 2Cs(s)+2H2O(l)→2CsOH(aq)+H2(g)Predict three observations you would make when a small piece of caesium is added to a large volume of water.
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.