••• Use If pencil is used for diagrams/sketches/graphs it must be dark
(HB or B).Fill in the boxescentre number and candidate number.black ink or ball-
point pen. at the top of this page with your name,
•• Answer Answer the questions in the spaces provided – there may be more space than you
needall questions. .
Information
•• The total mark for this paper is 90.The marks for – use this as a guide as to how much time to
spend on each questioneach question are shown in brackets .
• For the question marked with an asterisk (*), marks will be awarded for 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
P76895A ©2024 Pearson Education Ltd. *P76895A0128*
F:1/1/1/1/
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 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.
(i) Complete the table to show the percentage abundance of 34S.
(1)
Isotope S
32 33S S
34 S
36
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
, (2)
(Total for Question 1 = 6 marks)
*P76895A0228*
2 This question is about the formation of ions.
(a) Explain the trend in the values of the first electron affinities of the
elements shown.
(4)
Element First electron affinity / kJ mol−1
chlorine −349
bromine −325
iodine −295
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....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
3
Turn over
, ....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(b) Which of these isoelectronic ions has the smallest ionic radius?
(1)
A S2− B
Cl−
C K+
D Ca2+
*P76895A0328*
(c) Some series of successive ionisation energies in kJ mol−1 are shown. The
letters do not refer to the symbols of the elements.
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
C
D
(ii) Which element in the table could be described as an s-block element?
(1)
4
••• Use If pencil is used for diagrams/sketches/graphs it must be dark
(HB or B).Fill in the boxescentre number and candidate number.black ink or ball-
point pen. at the top of this page with your name,
•• Answer Answer the questions in the spaces provided – there may be more space than you
needall questions. .
Information
•• The total mark for this paper is 90.The marks for – use this as a guide as to how much time to
spend on each questioneach question are shown in brackets .
• For the question marked with an asterisk (*), marks will be awarded for 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
P76895A ©2024 Pearson Education Ltd. *P76895A0128*
F:1/1/1/1/
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 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.
(i) Complete the table to show the percentage abundance of 34S.
(1)
Isotope S
32 33S S
34 S
36
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
, (2)
(Total for Question 1 = 6 marks)
*P76895A0228*
2 This question is about the formation of ions.
(a) Explain the trend in the values of the first electron affinities of the
elements shown.
(4)
Element First electron affinity / kJ mol−1
chlorine −349
bromine −325
iodine −295
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
3
Turn over
, ....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(b) Which of these isoelectronic ions has the smallest ionic radius?
(1)
A S2− B
Cl−
C K+
D Ca2+
*P76895A0328*
(c) Some series of successive ionisation energies in kJ mol−1 are shown. The
letters do not refer to the symbols of the elements.
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
C
D
(ii) Which element in the table could be described as an s-block element?
(1)
4
