CHEMISTRY Paper 1 Inorganic and Physical Chemistry Tuesday 16 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 Section B TOTAL For this paper you must have: • the Periodic Table/Data Sheet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • All working must be shown. • Do all rough work in this book. Cross through any work you do not want to be marked. Information • The marks for questions are shown in brackets. • The maximum mark for this paper is 80. Advice You are advised to spend about 65 minutes on Section A and 25 minutes on Section B. *JUN237404101* IB/M/Jun23/E7 7404/1 Section A Answer all questions in this section. 0 1 0 1 0 1 0 1 This question is about the elements in Period 3. . 1 Give the full electron configuration of the element in Period 3 with the highest first ionisation energy. [1 mark] . 2 Give an equation, including state symbols, to represent the process that occurs when the second ionisation energy of sodium is measured. [1 mark] . 3 Table 1 shows some successive ionisation energies for an element in Period 3. Table 1 Ionisation number 1 2 3 4 5 6 7 8 Ionisation energy / kJ mol–1 1000 2260 3390 4540 6990 8490 27 100 31 700 Identify the Period 3 element. Explain your answer. [3 marks] Element Explanation 5 *02* 0 2 0 2 0 2 0 2 This question is about the elements in Group 2. . 1 Describe the structure and bonding in magnesium. [2 marks] . 2 State the trend in the atomic radius of the elements down Group 2 from Mg to Ba Give a reason for this trend. [2 marks] Trend Reason . 3 Give an equation, including state symbols, for the reaction of magnesium with steam. State two observations for this reaction. [3 marks] Equation Observation 2 Question 2 continues on the next page
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