Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
CHEMISTRY
Higher Tier Paper 1
Monday 19 May 2025 Morning Time allowed: 1 hour 45 minutes
Materials For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator 1
• the periodic table (enclosed).
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Pencil should only be used for drawing. 5
• Fill in the boxes at the top of this page.
• Answer all questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
9
• Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
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.
• In all calculations, show clearly how you work out your answer.
• You are reminded of the need for good English and clear presentation
in your answers.
*jun2584621H01*
IB/M/Jun25/G4007/E11 8462/1H
, 2
Do not write
outside the
0 1 This question is about elements in the periodic table. box
0 1 . 1 Describe where the non-metallic elements are found in the periodic table.
[1 mark]
0 1 . 2 Gallium (Ga) is a metallic element in Group 3.
Which of these properties of gallium is not typical of most metals?
[1 mark]
Tick () one box.
A boiling point above 1000 °C
A melting point below 100 °C
Conducts electricity when solid
Forms positive ions
*02*
IB/M/Jun25/8462/1H
, 3
Do not write
outside the
23
0 1 . 3 A sodium atom can be represented as 11Na
box
Complete Figure 1 to show the electronic structure of a sodium atom.
[1 mark]
Figure 1
0 1 . 4 Mendeleev created an early periodic table.
Mendeleev placed most of the elements in order of atomic weight.
Tellurium and iodine were not placed in order of atomic weight.
Why did Mendeleev not place tellurium and iodine in order of atomic weight?
[1 mark]
0 1 . 5 Argon is an element in Group 0 of the periodic table.
Explain why argon is unreactive.
[2 marks]
Turn over►
*03*
IB/M/Jun25/8462/1H
, 4
Do not write
outside the
An element X consists of two isotopes. box
0 1 . 6 What is meant by ‘isotopes’?
Answer in terms of subatomic particles.
[2 marks]
0 1 . 7 Table 1 shows the mass numbers and percentage abundances of the isotopes of X.
Table 1
Mass number Percentage abundance (%)
113 4
115 96
Which is the closest estimate to the relative atomic mass of X?
[1 mark]
Tick () one box.
∼113 ∼114 ∼115 9
*04*
IB/M/Jun25/8462/1H
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
CHEMISTRY
Higher Tier Paper 1
Monday 19 May 2025 Morning Time allowed: 1 hour 45 minutes
Materials For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator 1
• the periodic table (enclosed).
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Pencil should only be used for drawing. 5
• Fill in the boxes at the top of this page.
• Answer all questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
9
• Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
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.
• In all calculations, show clearly how you work out your answer.
• You are reminded of the need for good English and clear presentation
in your answers.
*jun2584621H01*
IB/M/Jun25/G4007/E11 8462/1H
, 2
Do not write
outside the
0 1 This question is about elements in the periodic table. box
0 1 . 1 Describe where the non-metallic elements are found in the periodic table.
[1 mark]
0 1 . 2 Gallium (Ga) is a metallic element in Group 3.
Which of these properties of gallium is not typical of most metals?
[1 mark]
Tick () one box.
A boiling point above 1000 °C
A melting point below 100 °C
Conducts electricity when solid
Forms positive ions
*02*
IB/M/Jun25/8462/1H
, 3
Do not write
outside the
23
0 1 . 3 A sodium atom can be represented as 11Na
box
Complete Figure 1 to show the electronic structure of a sodium atom.
[1 mark]
Figure 1
0 1 . 4 Mendeleev created an early periodic table.
Mendeleev placed most of the elements in order of atomic weight.
Tellurium and iodine were not placed in order of atomic weight.
Why did Mendeleev not place tellurium and iodine in order of atomic weight?
[1 mark]
0 1 . 5 Argon is an element in Group 0 of the periodic table.
Explain why argon is unreactive.
[2 marks]
Turn over►
*03*
IB/M/Jun25/8462/1H
, 4
Do not write
outside the
An element X consists of two isotopes. box
0 1 . 6 What is meant by ‘isotopes’?
Answer in terms of subatomic particles.
[2 marks]
0 1 . 7 Table 1 shows the mass numbers and percentage abundances of the isotopes of X.
Table 1
Mass number Percentage abundance (%)
113 4
115 96
Which is the closest estimate to the relative atomic mass of X?
[1 mark]
Tick () one box.
∼113 ∼114 ∼115 9
*04*
IB/M/Jun25/8462/1H
