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Group 1

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Question 10

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:

  • State the products formed and describe how the pH of the resulting solution can be demonstrated.
  • Outline two essential safety measures that must be implemented during this filming session.
[6]

Group 1 Questions

  1. GCSE
  2. /Chemistry
  3. /Group 1

Practise Edexcel GCSE Chemistry Group 1 with exam-style questions for Foundation and Higher tier. 51 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank