Oxford Cambridge and RSA
Friday 17 May 2024 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
F
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
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 begiven
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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
1
(a) Table 1.1 shows information about some of the elements in the Periodic Table.
Table 1.1
Atomic Group Electron
Element Period
Number Number Configuration
8 16(6) 2 2.6
........................
Sodium 11 2.8.1
........................ ........................
Chlorine 17(7) 3 2.8.7
........................
Calcium 20 2 4
........................
(i) Complete Table 1.1.
Use the Data Sheet. [5]
(ii) When atoms lose or gain electrons, they form charged particles called ions.State
the electron configuration of Na+ ions and Cl – ions.
Na+ ...................................................................................................................................................
Cl – ....................................................................................................................................................
[2]
© OCR 2024
, 3
(b) Ionic compounds form when electrons are transferred from one atom to another.
A dot and cross diagram is a model used to show the formation of an ionic compound.
Complete the diagram to show the arrangement of electrons and the charge of the ions incalcium
oxide.
Ca Ca
O O
[2]
(c) Table 1.2 gives information about some other ionic compounds.
Table 1.2
Compound Ions Present Formula Relative Formula Mass
Na+ and Cl – NaCl 58.5
...............................
Magnesium chloride MgCl 2
................................ .......................................
Mg2+ and O2– 40.3
............................... ................................
Complete Table 1.2.
Use these relative atomic masses: Mg = 24.3, Cl = 35.5.
[5]
© OCR 2024 Turn over
, 4
2 This question is about climate change.
(a)
(i) Complete the sentence to describe how the presence of carbon dioxide in the atmospherecauses an
increase in global temperatures.
Put a ring around each correct option.
Global warming occurs when infrared / ultra violet / visible radiation coming from
the Earth / the Sun / space is absorbed by carbon dioxide which prevents heat leaving
the atmosphere.
[2]
(ii) Name one other greenhouse gas.
..................................................................................................................................................... [1]
(b) One method to reduce the amount of carbon dioxide in the atmosphere is called carbon capture.Carbon
dioxide from power stations is collected and buried deep underground.
State one other method to reduce the amount of carbon dioxide in the atmosphere.
..........................................................................................................................................................
..................................................................................................................................................... [1]
© OCR 2024
Friday 17 May 2024 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
F
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
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 begiven
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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
1
(a) Table 1.1 shows information about some of the elements in the Periodic Table.
Table 1.1
Atomic Group Electron
Element Period
Number Number Configuration
8 16(6) 2 2.6
........................
Sodium 11 2.8.1
........................ ........................
Chlorine 17(7) 3 2.8.7
........................
Calcium 20 2 4
........................
(i) Complete Table 1.1.
Use the Data Sheet. [5]
(ii) When atoms lose or gain electrons, they form charged particles called ions.State
the electron configuration of Na+ ions and Cl – ions.
Na+ ...................................................................................................................................................
Cl – ....................................................................................................................................................
[2]
© OCR 2024
, 3
(b) Ionic compounds form when electrons are transferred from one atom to another.
A dot and cross diagram is a model used to show the formation of an ionic compound.
Complete the diagram to show the arrangement of electrons and the charge of the ions incalcium
oxide.
Ca Ca
O O
[2]
(c) Table 1.2 gives information about some other ionic compounds.
Table 1.2
Compound Ions Present Formula Relative Formula Mass
Na+ and Cl – NaCl 58.5
...............................
Magnesium chloride MgCl 2
................................ .......................................
Mg2+ and O2– 40.3
............................... ................................
Complete Table 1.2.
Use these relative atomic masses: Mg = 24.3, Cl = 35.5.
[5]
© OCR 2024 Turn over
, 4
2 This question is about climate change.
(a)
(i) Complete the sentence to describe how the presence of carbon dioxide in the atmospherecauses an
increase in global temperatures.
Put a ring around each correct option.
Global warming occurs when infrared / ultra violet / visible radiation coming from
the Earth / the Sun / space is absorbed by carbon dioxide which prevents heat leaving
the atmosphere.
[2]
(ii) Name one other greenhouse gas.
..................................................................................................................................................... [1]
(b) One method to reduce the amount of carbon dioxide in the atmosphere is called carbon capture.Carbon
dioxide from power stations is collected and buried deep underground.
State one other method to reduce the amount of carbon dioxide in the atmosphere.
..........................................................................................................................................................
..................................................................................................................................................... [1]
© OCR 2024
