2023 AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] GCSE CHEMISTRY Higher Tier Paper 1 H Monday 22 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all 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). • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information • The maximum mark for this paper is 100. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL *JUN2384621H01* IB/M/Jun23/E15 8462/1H 2 0 1 Discoveries in chemistry led to a better understanding of atomic structure. 0 1 . 1 Atoms were originally thought to be tiny spheres that could not be divided. The plum pudding model of the atom was then developed. Figure 1 represents the plum pudding model of the atom. Figure 1 Describe the plum pudding model of the atom. [2 marks] 0 1 . 2 Atoms contain electrons, neutrons and protons. Write these three particles in order of their discovery. [1 mark] Earliest Latest Do not write outside the box *02* IB/M/Jun23/8462/1H 3 Very few atoms of the element tennessine (Ts) have ever been identified. The atomic number of tennessine is 117 0 1 . 3 Predict the number of outer shell electrons in an atom of tennessine. Give one reason for your answer. Use the periodic table. [2 marks] Number of outer shell electrons Reason 0 1 . 4 Tennessine was first identified by a small group of scientists in 2010. Suggest one reason why tennessine was not accepted as a new element by other scientists until 2015. [1 mark] Question 1 continues on the next page Do not write outside the box Turn over ► *03* IB/M/Jun23/8462/1H 4 0 1 . 5 The discovery of isotopes explained why some relative atomic masses are not whole numbers. Element R has two isotopes. Table 1 shows the mass numbers and percentage abundances of the isotopes of element R. Table 1 Mass number Percentage abundance (%) 6 7.6 7 92.4 Calculate the relative atomic mass (Ar) of element R. Give your answer to 1 decimal place.