Oxford Cambridge and RSA
Examinations Higher GCSECombined
Science B Twenty First Century
ScienceJ260/02: Chemistry (Foundation
Tier) General Certificate of Secondary
Education (with marking scheme)
, Oxford Cambridge and RSA
Monday 22 May 2023 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
F
* 9 9 3 0 6 0 0 0 3 4 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 6 0 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 95.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2023 [601/8690/2] OCR is an exempt Charity
DC (CJ/CGW) 326970/4 Turn over
, 2
1 The diagram shows part of Mendeleev’s Periodic Table.
B C N O F
11 12 14 16 19
Al Si P S Cl
27 28 31 32 35.5
As Se Br
75 79 80
In Sn Sb Te I
115 119 122 128 127
(a) Give the symbols of the two elements shown in the diagram which are not in order of atomic
mass.
........................................................... and ........................................................... [1]
(b) Mendeleev left gaps for elements that had not been discovered.
(i) Name the two elements that had not been discovered when Mendeleev wrote his
Periodic Table.
Use the diagram and the Data Sheet.
........................................................... and ........................................................... [2]
(ii) Describe how the discovery of new elements supported Mendeleev’s decision to leave
gaps.
...........................................................................................................................................
...................................................................................................................................... [1]
© OCR 2023
, 3
(c) The table shows the atomic number and electron arrangement of some of the elements in
Group 1 of the modern Periodic Table.
Element Atomic number Electron arrangement
Lithium 3 2.1
Sodium 11 2.8.1
Potassium 19 2.8.8.1
Which two statements explain how the reactions of lithium, sodium and potassium are
related to their electron arrangements and so to their atomic number?
Tick (3) two boxes.
The atomic number is the mass of the atom.
The atomic number is the number of electrons in the atom.
The atomic number is the number of neutrons in the atom.
The elements all have the same electron arrangement.
The elements all have the same number of electrons in their outer shell.
[2]
(d) Lithium reacts with cold water to produce hydrogen gas and a solution of lithium hydroxide.
(i) Complete the equation by adding the state symbols.
2Li (......) + 2H2O (......) 2 LiOH (......) + H2 (......)
[2]
(ii) Describe an experiment to show that the reactivity of the Group 1 elements increases
down the group.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
© OCR 2023 Turn over
Examinations Higher GCSECombined
Science B Twenty First Century
ScienceJ260/02: Chemistry (Foundation
Tier) General Certificate of Secondary
Education (with marking scheme)
, Oxford Cambridge and RSA
Monday 22 May 2023 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
F
* 9 9 3 0 6 0 0 0 3 4 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 6 0 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 95.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2023 [601/8690/2] OCR is an exempt Charity
DC (CJ/CGW) 326970/4 Turn over
, 2
1 The diagram shows part of Mendeleev’s Periodic Table.
B C N O F
11 12 14 16 19
Al Si P S Cl
27 28 31 32 35.5
As Se Br
75 79 80
In Sn Sb Te I
115 119 122 128 127
(a) Give the symbols of the two elements shown in the diagram which are not in order of atomic
mass.
........................................................... and ........................................................... [1]
(b) Mendeleev left gaps for elements that had not been discovered.
(i) Name the two elements that had not been discovered when Mendeleev wrote his
Periodic Table.
Use the diagram and the Data Sheet.
........................................................... and ........................................................... [2]
(ii) Describe how the discovery of new elements supported Mendeleev’s decision to leave
gaps.
...........................................................................................................................................
...................................................................................................................................... [1]
© OCR 2023
, 3
(c) The table shows the atomic number and electron arrangement of some of the elements in
Group 1 of the modern Periodic Table.
Element Atomic number Electron arrangement
Lithium 3 2.1
Sodium 11 2.8.1
Potassium 19 2.8.8.1
Which two statements explain how the reactions of lithium, sodium and potassium are
related to their electron arrangements and so to their atomic number?
Tick (3) two boxes.
The atomic number is the mass of the atom.
The atomic number is the number of electrons in the atom.
The atomic number is the number of neutrons in the atom.
The elements all have the same electron arrangement.
The elements all have the same number of electrons in their outer shell.
[2]
(d) Lithium reacts with cold water to produce hydrogen gas and a solution of lithium hydroxide.
(i) Complete the equation by adding the state symbols.
2Li (......) + 2H2O (......) 2 LiOH (......) + H2 (......)
[2]
(ii) Describe an experiment to show that the reactivity of the Group 1 elements increases
down the group.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
© OCR 2023 Turn over
