Chemistry paper 1
Please check the examination details below before entering your
candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel Level
3 GCE
Tuesday 13 May
Morning (Time: 1 hour 30 minutes)
2025 referen 8CH0/
ce
Chemistry Paper 01
🟐 🟐
Advanced Subsidiary
PAPER 1: Core Inorganic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet
Instructions
• Use black ink or ball-point
• If pencil is used for diagrams/sketches/graphs it must be dark
• Fill
pen.in
(HB or the boxes number
B). centre at the top of this
and page with
candidate your
number.
• provided – there may be more space
• Answer
name, all
Answer the questions in the spaces
questions.
than you need.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in
– use this as a guide as to how much time to spend on each question.
• For the question marked with an asterisk (*), marks will be awarded for
brackets
your ability to structure your answer logically, showing how the points
that you make are related or follow on from each other where
• appropriate.
A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to
• Show all your working in calculations and include units where appropriate.
• Check
answeryour
it. answers if you have time at Turn over
the end.
P77830A
©2025 Pearson
Chemistry paper 1
,Education Ltd. Y:1/1/1/
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you
AREA
DO NOT WRITE IN THIS
change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 Chlorine, Cl2 , and silicon tetrachloride, SiCl4 , are covalently bonded
molecules with low boiling temperatures.
(a) The definition of electronegativity is the ability of an atom to attract
(1)
A a single bonding electron from a covalent bond
B a pair of electrons from a covalent bond
C electron density from a neighbouring atom
D two electrons from a positive ion
(b) Draw a dot-and-cross diagram of silicon tetrachloride, showing outer
shells of electrons only.
Use crosses (×) for silicon electrons and dots (•) for chlorine electrons.
AREA
DO NOT WRITE IN THIS
(2)
AREA
DO NOT WRITE IN THIS
2
■■■
■
Please check the examination details below before entering your
candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel Level
3 GCE
Tuesday 13 May
Morning (Time: 1 hour 30 minutes)
2025 referen 8CH0/
ce
Chemistry Paper 01
🟐 🟐
Advanced Subsidiary
PAPER 1: Core Inorganic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet
Instructions
• Use black ink or ball-point
• If pencil is used for diagrams/sketches/graphs it must be dark
• Fill
pen.in
(HB or the boxes number
B). centre at the top of this
and page with
candidate your
number.
• provided – there may be more space
• Answer
name, all
Answer the questions in the spaces
questions.
than you need.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in
– use this as a guide as to how much time to spend on each question.
• For the question marked with an asterisk (*), marks will be awarded for
brackets
your ability to structure your answer logically, showing how the points
that you make are related or follow on from each other where
• appropriate.
A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to
• Show all your working in calculations and include units where appropriate.
• Check
answeryour
it. answers if you have time at Turn over
the end.
P77830A
©2025 Pearson
Chemistry paper 1
,Education Ltd. Y:1/1/1/
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you
AREA
DO NOT WRITE IN THIS
change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 Chlorine, Cl2 , and silicon tetrachloride, SiCl4 , are covalently bonded
molecules with low boiling temperatures.
(a) The definition of electronegativity is the ability of an atom to attract
(1)
A a single bonding electron from a covalent bond
B a pair of electrons from a covalent bond
C electron density from a neighbouring atom
D two electrons from a positive ion
(b) Draw a dot-and-cross diagram of silicon tetrachloride, showing outer
shells of electrons only.
Use crosses (×) for silicon electrons and dots (•) for chlorine electrons.
AREA
DO NOT WRITE IN THIS
(2)
AREA
DO NOT WRITE IN THIS
2
■■■
■
