Pearson Edexcel a level chemistry (9CH0/01) question paper 1 june 2024 +Merged with mark scheme

Pearson Edexcel a level chemistry (9CH0/01)

question paper 1 june 2024 +Merged with mark

scheme

, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an




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answer, put a line through the box and then mark your new answer with a cross .

1 This question is about atomic structure.
(a) Complete the table.
(3)


Species Number of protons Number of neutrons Number of electrons
32
S
33
S
34 2−
S


(b) A sample of sulfur was found to contain only four isotopes.




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(i) Complete the table to show the percentage abundance of 34S.
(1)

32 33 34 36
Isotope S S S S

Percentage
95.02 0.75 0.02
abundance


(ii) Calculate the relative atomic mass (Ar ) of the sulfur in this sample using the
data in the table. Give your answer to two decimal places.
(2)



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(Total for Question 1 = 6 marks)

2
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, 2 This question is about the formation of ions.

(a) Explain the trend in the values of the first electron affinities of the
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elements shown.
(4)


Element First electron affinity / kJ mol−1

chlorine −349

bromine −325

iodine −295


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(b) Which of these isoelectronic ions has the smallest ionic radius?
(1)
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A S2−
B Cl−

C K+

D Ca2+




3
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, (c) Some series of successive ionisation energies in kJ mol−1 are shown.
The letters do not refer to the symbols of the elements.




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Element Successive ionisation energies / kJ mol−1

A 578 1817 2745 11 578 14 831

B 653 1592 2987 4740 6686

C 738 1451 7733 10 541 13 629

D 1086 2353 4621 6223 37 832


(i) Which element in the table could be in Group 4?
(1)
A
B




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C

D


(ii) Which element in the table could be described as an s-block element?
(1)
A

B

C

D


(Total for Question 2 = 7 marks) DO NOT WRITE IN THIS AREA




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