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Edexcel GCE In Chemistry (8CH0) Paper 01: Core Inorganic and Physical Chemistry may 2023
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Edexcel GCE In Chemistry (8CH0) Paper 01: Core Inorganic and Physical Chemistry may 2023
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[Date] Pearson EdexcelGCE In
Chemistry
(8CH0) Paper 01
: Core Inorganic and Physical
Chemistry
[Author name]
[COMPANY NAME]
,Instructions
• Use black ink or ball‑point pen.
• If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all
• Answer
provided
the questions in the spaces
questions.– there may be more space than
you need.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in brackets
• For the question marked with an asterisk (*), marks will be awarded for
– use this as a guide as to how much time to spend on each question.
your ability to structure your answer logically, showing 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 answer it.
• Show all your working in calculations and include units where
• appropriate. Check your answers if you have time at the end.
Turn over
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you
change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 Atoms of silicon contain protons, neutrons and electrons.
(a) Which are the correct data for a proton and a neutron?
(1)
Proton Neutron
Relative charge Relative mass Relative charge Relative mass
A +1 1 –1 0.0005
+1 1 0 1
B
–1 0.0005 0 1
C
0 1 +1 1
D
(b) (i) State the shape of the 2s orbital of a silicon
atom. (1)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
(ii) State the difference between the two subatomic particles in the 2s
orbital. (1)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
2
, (c) Silicon has three stable isotopes.
A sample of silicon was found to have a relative atomic mass, Ar , of 28.11
due to the presence of only the three stable isotopes.
The abundance for two of the isotopes is given in the table.
Isotope Abundance / %
28
Si 92.2
30
Si 3.1
Determine the relative isotopic mass of the third stable
isotope. You must show your working.
(2)
(d) Give the symbol, including the mass number and atomic number, for an
atom of element X that has four fewer protons and three fewer neutrons
14 an atom of 28Si.
than
(1)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
(Total for Question 1 = 6 marks)
3
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