Oxford Cambridge and RSA
Tuesday 11 June 2024 – Morning
GCSE (9–1) Chemistry B (Twenty First Century Science)
J258/02 Depth in Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9-1) Chemistry B
(inside this document)
F
You can use:
• a scientific or graphical calculator
• an HB pencil
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 page 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 90.
• 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 28 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
1 A student makes a model of an atom.
(a) The student uses small, coloured beads to represent the protons and neutrons in the nucleus of
the model. This is shown in the diagram below.
Complete the diagram to show the correct arrangement of electrons in the atom.
Use X to represent each electron.
Key
Proton
Neutron
Nucleus contains
5 protons and
6 neutrons
[2]
(b) Complete the sentences.
Use words from the list.
ions negative neutral neutrons positive protons
Atoms contain a nucleus with a .................................................... charge.
The atomic number gives the number of .................................................... in an atom.
[2]
© OCR 2024
, 3
(c) The bead the student uses to represent a proton has a diameter of 1 cm.
Bead
1 cm
The student finds out that an atom is 1 × 105 times larger than a proton.
If they make their model to scale, what is the diameter of the model atom?
Put a ring around the correct option.
100 cm 1000 cm 10 000 cm 100 000 cm
[1]
(d) The student makes models of some other atoms.
The particles in each atom are shown in the table.
Number of Number of Electron
Atom
protons neutrons arrangement
A 3 4 2.1
B 8 8 2.6
C 12 12 2.8.2
(i) Which atom, A, B or C, has the highest mass number?
Explain your answer.
Atom ..........
Explanation ......................................................................................................................................
..........................................................................................................................................................
[2]
(ii) The student uses the table to decide A is a metal atom.
The student is correct.
How does the student know?
Tick (✓) one box.
Atom A has one electron in the outer shell.
Atom A has two electrons in the first shell.
Atom A has two shells of electrons.
[1]
© OCR 2024 Turn over
, 4
2 The parts used to make a bike contain mainly iron.
The diagram shows the methods to prevent corrosion that are used on some parts of a bike.
Frame is coated with paint
Wheel supports
are coated with
zinc
Chain is coated with oil
(a) Some methods to prevent corrosion work by forming a protective barrier. Some work by
sacrificial protection.
Draw lines to connect each coating with how the coating prevents corrosion on the bike.
How the coating
Coating
prevents corrosion
Oil Forms a protective
barrier.
Paint
Works by sacrificial
Zinc protection.
[2]
© OCR 2024
Tuesday 11 June 2024 – Morning
GCSE (9–1) Chemistry B (Twenty First Century Science)
J258/02 Depth in Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9-1) Chemistry B
(inside this document)
F
You can use:
• a scientific or graphical calculator
• an HB pencil
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 page 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 90.
• 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 28 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
1 A student makes a model of an atom.
(a) The student uses small, coloured beads to represent the protons and neutrons in the nucleus of
the model. This is shown in the diagram below.
Complete the diagram to show the correct arrangement of electrons in the atom.
Use X to represent each electron.
Key
Proton
Neutron
Nucleus contains
5 protons and
6 neutrons
[2]
(b) Complete the sentences.
Use words from the list.
ions negative neutral neutrons positive protons
Atoms contain a nucleus with a .................................................... charge.
The atomic number gives the number of .................................................... in an atom.
[2]
© OCR 2024
, 3
(c) The bead the student uses to represent a proton has a diameter of 1 cm.
Bead
1 cm
The student finds out that an atom is 1 × 105 times larger than a proton.
If they make their model to scale, what is the diameter of the model atom?
Put a ring around the correct option.
100 cm 1000 cm 10 000 cm 100 000 cm
[1]
(d) The student makes models of some other atoms.
The particles in each atom are shown in the table.
Number of Number of Electron
Atom
protons neutrons arrangement
A 3 4 2.1
B 8 8 2.6
C 12 12 2.8.2
(i) Which atom, A, B or C, has the highest mass number?
Explain your answer.
Atom ..........
Explanation ......................................................................................................................................
..........................................................................................................................................................
[2]
(ii) The student uses the table to decide A is a metal atom.
The student is correct.
How does the student know?
Tick (✓) one box.
Atom A has one electron in the outer shell.
Atom A has two electrons in the first shell.
Atom A has two shells of electrons.
[1]
© OCR 2024 Turn over
, 4
2 The parts used to make a bike contain mainly iron.
The diagram shows the methods to prevent corrosion that are used on some parts of a bike.
Frame is coated with paint
Wheel supports
are coated with
zinc
Chain is coated with oil
(a) Some methods to prevent corrosion work by forming a protective barrier. Some work by
sacrificial protection.
Draw lines to connect each coating with how the coating prevents corrosion on the bike.
How the coating
Coating
prevents corrosion
Oil Forms a protective
barrier.
Paint
Works by sacrificial
Zinc protection.
[2]
© OCR 2024
