AQA AS Specimen Paper 1 Q1

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Section A Answer all questions in this section. This question is about the elements in Group 2 and their compounds. Use the Periodic Table to deduce the full electron configuration of calcium. Write an ionic equation, with state symbols, to show the reaction of calcium with an excess of water. [1 mark] [1 mark] State the role of water in the reaction with calcium. [1 mark] Write an equation to show the process that occurs when the first ionisation energy of calcium is measured. 0 1 . 1 0 1 . 2 . 3 0 1 . 4 0 1 . 5 0 1 State and explain the trend in the first ionisation energies of the elements in Group 2 from magnesium to barium. [1 mark] [3 marks] Trend Explanation Barcode Typesetter code Turn over <br />

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