AQA GCSE Chemistry Higher Tier Paper 1 2025 | Exam & Mark Scheme

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GCSE
CHEMISTRY
Higher Tier N Paper 1 N
H
Monday 19 May 2025 N N N Morning Time allowed: 1 hour 45 minutes
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Materials For Examiner’s Use
For this paper you must have:
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 a ruler
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 a scientific calculator
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 the periodic table (enclosed).
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Instructions 3
 Use black ink or black ball-point pen.
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 Pencil should only be used for drawing.
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 Fill in the boxes at the top of this page.
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 Answer all questions in the spaces provided. Do not write outside
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the box around each page or on blank pages.
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 If you need extra space for your answer(s), use the lined pages at the end of
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this book. Write the question number against your answer(s).
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 Do all rough work in this book. Cross through any work you do not want
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to be marked.
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Information
 The maximum mark for this paper is 100.
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 The marks for questions are shown in brackets.
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 You are expected to use a calculator where appropriate.
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 In all calculations, show clearly how you work out your answer.
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 You are reminded of the need for good English and clear presentation
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in your answers.
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IB/M/Jun25/G4007/E11 8462/1H

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0 1 N This question is about elements in the periodic table.
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0 1 . 1 Describe where the non-metallic elements are found in the periodic table.
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[1 mark]
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0 1 . 2 Gallium (Ga) is a metallic element in Group 3.
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Which of these properties of gallium is not typical of most metals?
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[1 mark]
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Tick () one box.
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A boiling point above 1000 °C
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A melting point below 100 °C
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Conducts electricity when solid
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Forms positive ions
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IB/M/Jun25/8462/1H

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0 1 . 3 A sodium atom can be represented as 2311Na
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Complete Figure 1 to show the electronic structure of a sodium atom.
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[1 mark]
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Figure 1 N




0 1 . 4 Mendeleev created an early periodic table.
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Mendeleev placed most of the elements in order of atomic weight. Telluriu
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m and iodine were not placed in order of atomic weight.
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Why did Mendeleev not place tellurium and iodine in order of atomic weight?
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[1 mark]
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0 1 . 5 Argon is an element in Group 0 of the periodic table.
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Explain why argon is unreactive.
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[2 marks]
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Turn over► N




IB/M/Jun25/8462/1H

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An element X consists of two isotopes.
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0 1 . 6 What is meant by ‘isotopes’?
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Answer in terms of subatomic particles.
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[2 marks]
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0 1 . 7 Table 1 shows the mass numbers and percentage abundances of the isotopes of X.
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Table 1 N




Mass number N Percentage abundance (%)
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113 4

115 96



Which is the closest estimate to the relative atomic mass of X?
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[1 mark]
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∼113 ∼114 ∼115 9




IB/M/Jun25/8462/1H