2025 Pearson Edexcel Level 1/Level 2 GCSE (9–1) Combined Science PAPER 2
Higher Tier Combined Question Paper and Marking Scheme
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Monday 19 May 2025
Morning (Time: 1 hour 10 minutes) Paper
reference 1SC0/1CH
Combined Science
PAPER 2
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball‑point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 60.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related
or follow on from each other where appropriate.
Advice
• Try
Read each question carefully before you start to answer it.
•• Checkto answer every question.
your answers if you have time at the end.
Turn over
P75513RA
©2025 Pearson Education Ltd.
Y:1/1/1/1/1/1/1
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BLANK PAGE
2
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) Atoms of neon are made up of subatomic particles.
(i) Figure 1 shows some information about the subatomic particles in
neon atoms.
Complete Figure 1 with the missing information.
(3)
subatomic particle relative charge relative mass
proton 1
..............................................................
neutron 0
..............................................................
electron negligible
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..............................................................
Figure 1
(ii) All atoms of neon have an atomic number of 10.
Describe what information about the number of subatomic particles can be
obtained from the atomic number of neon.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
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(iii) Explain why atoms of neon are electrically neutral.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
3
Turn over
, (b) A sample of neon contains three isotopes
90.48% of neon‑20
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0.27% of neon‑21
9.25% of neon‑22
Using this information, calculate the relative atomic mass of this sample of neon.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
relative atomic mass = ..............................................................
(Total for Question 1 = 9 marks)
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4
Higher Tier Combined Question Paper and Marking Scheme
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Monday 19 May 2025
Morning (Time: 1 hour 10 minutes) Paper
reference 1SC0/1CH
Combined Science
PAPER 2
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball‑point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 60.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related
or follow on from each other where appropriate.
Advice
• Try
Read each question carefully before you start to answer it.
•• Checkto answer every question.
your answers if you have time at the end.
Turn over
P75513RA
©2025 Pearson Education Ltd.
Y:1/1/1/1/1/1/1
,DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
BLANK PAGE
2
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) Atoms of neon are made up of subatomic particles.
(i) Figure 1 shows some information about the subatomic particles in
neon atoms.
Complete Figure 1 with the missing information.
(3)
subatomic particle relative charge relative mass
proton 1
..............................................................
neutron 0
..............................................................
electron negligible
DO NOT WRITE IN THIS AREA
..............................................................
Figure 1
(ii) All atoms of neon have an atomic number of 10.
Describe what information about the number of subatomic particles can be
obtained from the atomic number of neon.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
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(iii) Explain why atoms of neon are electrically neutral.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
3
Turn over
, (b) A sample of neon contains three isotopes
90.48% of neon‑20
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0.27% of neon‑21
9.25% of neon‑22
Using this information, calculate the relative atomic mass of this sample of neon.
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
relative atomic mass = ..............................................................
(Total for Question 1 = 9 marks)
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4
