plumiHow have our ideas about atoms developed over time?: OCR GCSE Chemistry B questions
Every OCR GCSE Chemistry B exam question on C2.1 How have our ideas about atoms developed over time?, 2018–2025, with its mark scheme and examiner’s report.
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Calculations
Q10(a)
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Q10(b)
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Q2(a)
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Q2(b)
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Q7(a)
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Q7(a)(i)
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Q7(a)(ii)
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The whole paper ↗Q11(c)
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Q1(a)
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Q1(b)
The whole paper ↗Q1(c)
The whole paper ↗Q1(d)(i)
The whole paper ↗Q2(c)
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Q3(a)(i)
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Q3(a)(ii)
The whole paper ↗Q3(b)
The whole paper ↗Q9(d)
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All 56 questions on How have our ideas about atoms developed over time?, as a list
- June 2025, Paper 1 Foundation, Q10(a) (2 marks): The table shows the relative masses and relative charges of protons, neutrons and electrons. Complete the table by filling in the blanks. Particle Relative mass
- June 2025, Paper 1 Foundation, Q10(b) (3 marks): Fig. 10.1 shows information about fluorine. Fig. 10.1 9 F Fluorine 19.00 Find the number of protons, neutrons and electrons in an atom of fluorine. Protons = Ne
- June 2025, Paper 1 Foundation, Q10(c) (2 marks): The size and scale of atoms can be compared to objects in the physical world. A student builds a model of a hydrogen atom using a football to represent the nucl
- June 2025, Paper 3 Higher, Q2(a) (2 marks): The table shows the relative masses and relative charges of protons, neutrons and electrons. Complete the table by filling in the blanks. Particle Relative mass
- June 2025, Paper 3 Higher, Q2(b) (3 marks): Fig. 2.1 shows information about fluorine. Fig. 2.1 9 F Fluorine 19.00 Find the number of protons, neutrons and electrons in an atom of fluorine. Protons = Neut
- June 2025, Paper 3 Higher, Q2(c) (2 marks): The size and scale of atoms can be compared to objects in the physical world. A student builds a model of a hydrogen atom using a football to represent the nucl
- June 2025, Paper 4 Higher, Q7(a) (1 mark): Which of these is the best estimate for the diameter of a carbon atom? Tick (✓) one box. 1 × 10 –8 m 1 × 10 –10 m 10 nm 1 × 1010 nm [1]
- June 2024, Paper 1 Foundation, Q7(a)(i) (1 mark): Complete the table to show the name of the scientist who had the idea that all matter is made up of atoms. Scientist Year Idea All matter is made of tiny partic
- June 2024, Paper 1 Foundation, Q7(a)(ii) (1 mark): What is the name of the atomic model proposed by Thomson? Tick (✓) one box. Nuclear model Particle model Plum pudding model [1]
- June 2024, Paper 1 Foundation, Q7(b) (1 mark): In 1913, Bohr discovered that electrons move around the nucleus of an atom in orbits. What are these orbits called? [1]
- June 2024, Paper 1 Foundation, Q11(c) (2 marks): An atom of sodium has an atomic number of 11 and a mass number of 23. State the number of protons, neutrons and electrons in a sodium atom. Number of protons =
- June 2024, Paper 2 Foundation, Q1(a) (2 marks): 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 diagr
- June 2024, Paper 2 Foundation, Q1(b) (2 marks): 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
- June 2024, Paper 2 Foundation, Q1(c) (1 mark): 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 t
- June 2024, Paper 2 Foundation, Q1(d)(i) (2 marks): Which atom, A, B or C, has the highest mass number? Explain your answer. Atom Explanation [2]
- June 2024, Paper 3 Higher, Q2(c) (2 marks): An atom of sodium has an atomic number of 11 and a mass number of 23. State the number of protons, neutrons and electrons in a sodium atom. Number of protons =
- June 2024, Paper 4 Higher, Q3(a)(i) (2 marks): Complete the diagram to show the arrangement of electrons in the atom. Use X to represent each electron. [2]
- June 2024, Paper 4 Higher, Q3(a)(ii) (3 marks): Write a description for each of the particles in the atom. Your description should include the relative charges, relative masses and position of each particle.
- June 2024, Paper 4 Higher, Q3(b) (2 marks): In the model, the protons have a diameter of 0.5 cm. Model of proton 0.5 cm An atom is 1 × 105 times larger than a proton. If they make their model to scale, wh
- June 2023, Paper 1 Foundation, Q9(d) (1 mark): An argon atom has a mass number of 40. Calculate the number of neutrons in its nucleus. Use the Periodic Table. Number of neutrons = [1]
- June 2023, Paper 2 Foundation, Q9(a) (2 marks): Give two differences between the modern model and Dalton’s model. 1 2 [2]
- June 2023, Paper 2 Foundation, Q9(b) (2 marks): Which element is represented by the modern model in the diagram? Explain your answer. Use the Data Sheet. Element Explanation [2]
- June 2023, Paper 2 Foundation, Q9(c)(i) (1 mark): Explain how Dalton’s formula for carbon dioxide agrees with its modern formula. [1]
- June 2023, Paper 2 Foundation, Q9(c)(ii) (2 marks): Give two reasons why Dalton’s formula for chlorine disagrees with its modern formula. 1 2 [2]
- June 2023, Paper 2 Foundation, Q9(d) (2 marks): Put the particles in order from largest to smallest. Atom Electron Molecule of oxygen Polymer Proton Largest Smallest [2]
- June 2023, Paper 3 Higher, Q1(d) (1 mark): An argon atom has a mass number of 40. Calculate the number of neutrons in its nucleus. Use the Periodic Table. Number of neutrons = [1]
- June 2023, Paper 3 Higher, Q4 (6 marks): (a) There are two main isotopes of oxygen, 16O and 18O. The table shows information about the 4 atomic structure of 16O. 16O Number of protons 8 Number of neutr
- June 2023, Paper 4 Higher, Q1(a) (2 marks): Give two differences between the modern model and Dalton’s model. 1 2 [2]
- June 2023, Paper 4 Higher, Q1(b) (2 marks): Which element is represented by the modern model in the diagram? Explain your answer. Use the Data Sheet. Element Explanation [2]
- June 2023, Paper 4 Higher, Q1(c)(i) (1 mark): Explain how Dalton’s formula for carbon dioxide agrees with its modern formula. [1]
- June 2023, Paper 4 Higher, Q1(c)(ii) (2 marks): Give two reasons why Dalton’s formula for chlorine disagrees with its modern formula. 1 2 [2]
- June 2023, Paper 4 Higher, Q1(d) (2 marks): Put the particles in order from largest to smallest. Atom Electron Molecule of oxygen Polymer Proton Largest Smallest [2]
- June 2022, Paper 1 Foundation, Q2(b)(iv) (1 mark): What does atomic number tell you about the nucleus of an atom? [1]
- June 2022, Paper 2 Foundation, Q1(c)(i) (1 mark): Which information from the Periodic Table shows us that a sodium atom contains a total of 11 electrons? Tick (3) one box. the atomic number the chemical symbol
- June 2022, Paper 3 Higher, Q5(d) (2 marks): An isotope of iodine has a mass number of 127. How many neutrons and electrons does an atom of this isotope have? Use the Data Sheet. Number of neutrons = Numbe
- November 2021, Paper 1 Foundation, Q5(a) (1 mark): Which scientist suggested the atomic model in Fig. 5.1? Put a ring around the correct answer. Dalton Thomson Rutherford Bohr [1]
- November 2021, Paper 1 Foundation, Q5(b) (3 marks): The modern model of the atom is different from the model in Fig. 5.1. Complete the sentences about the modern model of the atom. Use the words. You can use each
- November 2021, Paper 2 Foundation, Q2(c)(i) (2 marks): Complete Fig. 2.3 to show the arrangement of electrons in a sodium atom. Na Sodium (atomic number 11) Fig. 2.3 [2]
- November 2021, Paper 2 Foundation, Q8(e) (3 marks): Kai designs a sign to tell people about the particles inside a sodium atom. Complete the missing information on the sign. Particles inside a sodium atom 11 Na s
- November 2021, Paper 3 Higher, Q6(a) (1 mark): Name the particles represented by black circles in the model. [1]
- November 2021, Paper 3 Higher, Q6(b)(i) (1 mark): Identify the element in Fig. 6.1. Use the Data Sheet. [1]
- November 2021, Paper 3 Higher, Q6(b)(ii) (1 mark): How was the element in Fig. 6.1 identified in (b)(i)? [1]
- November 2021, Paper 4 Higher, Q1(e) (3 marks): Kai designs a sign to tell people about the particles inside a sodium atom. Complete the missing information on the sign. Particles inside a sodium atom 11 Na s
- June 2019, Paper 1 Foundation, Q7(a) (1 mark): Describe how Dalton’s model of the atom was different to Rutherford’s. [1]
- June 2019, Paper 1 Foundation, Q7(b) (1 mark): Name the ‘negatively charged particles’ in Rutherford’s model. [1]
- June 2019, Paper 1 Foundation, Q7(c) (2 marks): We currently know that the nucleus of an atom contains protons and neutrons. Complete the table by filling in the blank spaces. Relative Charge Relative Mass Pr
- June 2019, Paper 1 Foundation, Q7(d) (2 marks): The table shows the number of protons and neutrons in a sodium atom. Complete the table by filling in the blank spaces. Atomic Protons Mass Neutrons number numb
- June 2019, Paper 1 Foundation, Q7(e) (2 marks): Kai finds some information on the internet. Approximate size (m) 5.3 × 10−11 Hydrogen atom 2.9 × 10−10 Hydrogen molecule Oxygen molecule 3.5 × 10−10 8.7 × 10−16
- June 2019, Paper 3 Higher, Q7(a) (1 mark): Thomson’s ‘plum pudding’ atom was an earlier model of the atom. Describe one way in which Thomson’s model of the atom was different from Rutherford’s. [1]
- June 2019, Paper 3 Higher, Q7(b) (1 mark): Rutherford asked Hans Geiger and Ernest Marsden to do an experiment to test his model. They fired positive particles at a piece of gold foil. What did they see
- June 2019, Paper 3 Higher, Q7(c) (2 marks): A nut has an average diameter of 2 cm. 2 cm The diameter of an atom is on average 50 000 times bigger than the diameter of its nucleus. Estimate the diameter of
- June 2018, Paper 1 Foundation, Q5(e) (1 mark): An element has an atomic number of 16. How many electrons are there in an atom of this element? [1]
- June 2018, Paper 2 Foundation, Q5(a) (3 marks): Use the diagram and the Periodic Table provided to complete the missing information in the table. Name of atom fluorine Atomic Number 9 Number of electrons 9 Nu
- June 2018, Paper 2 Foundation, Q5(b)(i) (2 marks): Describe one way that an atom of fluorine and a fluoride ion are the same and one way that they are different. Same Different [2]
- June 2018, Paper 4 Higher, Q4(a) (3 marks): Use the diagram and the Periodic Table to identify the element and to complete the missing information in the table. Name of element Number of electrons 9 Numbe
- June 2018, Paper 4 Higher, Q4(b)(i) (2 marks): What is the charge on the ion? Explain your answer. Charge Explanation [2]
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