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4.1 Predicting chemical reactions

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Question 8

Small freshly cut samples of three Group 1 metals are exposed to air under the same conditions. Each sample has the same surface area.

MetalMean time for the freshly cut surface to lose its shine in s
Lithium150
Sodium35
Potassium6

Rubidium is the next element below potassium in Group 1.

Explain the trend in the results using the electronic structure of Group 1 metals. Predict a time for a freshly cut surface of rubidium to lose its shine under the same conditions.

[4]
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4.1 Predicting chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Predicting chemical reactions

113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.

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