OCR A Level Chemistry B (Salters) H433/01 Fundamentals of Chemistry QUESTION PAPER Monday 13 June 2022 – Morning

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1 Which feature of the structure of the atom was deduced from the Geiger and Marsden experiment? A Atoms consist of electrons, protons and neutrons. B The nucleus is small and dense. C Electrons e... xist in energy levels/shells. D Electrons exist in atomic orbitals. Your answer [1] 2 Which row gives the correct trends for the following properties of Group 2 elements and compounds going down the Group? First ionisation enthalpy of element Thermal stability of carbonate A Increases Increases B Increases Decreases C Decreases Increases D Decreases Decreases Your answer [1] 3 © OCR 2022 Turn over 3 The bar chart shows the melting points of the elements in Periods 2 and 3. What is the correct reason for the large decrease in melting point after Group 14 in both Periods? [Show More]

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