AS paper 1 inorganic and physical chemistry (Tuesday 16th may 2023) / AQA 2023 AS CHEMISTRY Paper 1 Inorganic and Physical Chemistry Question Paper & Mark scheme 2024 UPDATE

AS paper 1 inorganic and physical chemistry (Tuesday 16th may 2023) / AQA 2023 AS CHEMISTRY Paper 1 Inorganic and Physical Chemistry Question Paper & Mark scheme 2024 UPDATE Give the full electron configuration of the element in period 3 with the highest first ionisation energy. - ANSWER-1s2 2s2 2p6 3p6 Give an equation, including state symbols to represent the process that occurs when the second ionisation energy of sodium is measured. - ANSWER-Na⁺(g) → Na²⁺(g) + e⁻ Describe the structure and bonding in magnesium - ANSWER-It is a lattice of Mg²⁺ ions held together by their attraction for a 'sea' of delocalised electrons. State the trend in the atomic radius of the elements down Group 2 from Mg to Ba. Give a reason for this trend. - ANSWER-Trend: Increases Reason: Each successive element has an additional shell of electrons. Give an equation, including state symbols, for the reaction of magnesium with steam. State two observations from this reaction. - ANSWER-Equation: Mg(s) + H₂O(g)→MgO(s) + H₂(g) Observation 1: bright white flame Observation 2: white solid residue formed The sulphates of elements in Group 2 from Mg to Ba have different solubilities. State the formula of the least soluble of these sulphates. Give a use for this sulphate. - ANSWER-Formula: BaSO₄ Use: barium meal for x-rays A mixture of gases is analysed using TOF mass spectrometry. The mixture contains argon, carbon dioxide, nitrogen and oxygen. The mixture is ionised buy electron impact. Identify the ion formed from this mixture that reaches the detector last. Justify your answer. - ANSWER-Ion that reaches the detector last: CO₂⁺ Justification: Ion with the highest m/z ratio travels slowest. So charge must be +1, CO₂⁺, has highest relative mass (at 44). The temperature of the equilibrium mixture is decreased. Predict the effect, if any, on the value of Kc Give a reason for your prediction - ANSWER-Prediction: Increases Reason: exothermic reaction is favoured to replace the lost heat, forward reaction is exothermic so the equilibrium shifts to the right and kc increases. Which atom contains the most neurons? A- ⁵⁴Cr B- ⁵⁵Mn C- ⁵⁷Fe D- ⁵⁸Ni - ANSWER-C Explain why the electronegativity of the halogens decreases down the group - ANSWER-Shared pair of electrons will be further from the