Q1 · There are three different isotopes of hydrogen 0973/11 May/June 2019
40 There are three different isotopes of hydrogen. 1 H H 2 H 3 1 1 1 Which statement about the nuclei of these three isotopes is correct? A They have different numbers of electrons. B They have the same number of nucleons. C They have the same number of neutrons. D They have the same number of protons.
1 marks
Answer: D
This question in 0973/11 May/June 2019
Q2 · One atom of an isotope of fluorine is represented by 15 F 0973/11 May/June 2020
15 One atom of an isotope of fluorine is represented by 15 F . 9 How many neutrons does this atom have? A 6 B 9 C 10 D 15
1 marks
Answer: A
This question in 0973/11 May/June 2020
Q3 · The diagrams represent the nuclei of four different atoms V, W, X and Y 0973/11 May/June 2020
40 The diagrams represent the nuclei of four different atoms V, W, X and Y. V W X Y key n p n p proton p p n n n n p p p p n p p p n n neutron p n n n Which two diagrams represent isotopes of the same element? A V and Y B W and X C X and Y D Y and W
1 marks
Answer: C
This question in 0973/11 May/June 2020
Q4 · Which row shows the particles in the nucleus of an atom of 25 Mg ? 0973/12 May/June 2020
15 Which row shows the particles in the nucleus of an atom of 25 Mg ? 12 protons neutrons A 12 12 B 12 13 C 13 12 D 13 13
1 marks
Answer: B
This question in 0973/12 May/June 2020
Q5 · The diagrams represent the nuclei of four different atoms V, W, X and Y 0973/12 May/June 2020
40 The diagrams represent the nuclei of four different atoms V, W, X and Y. V W X Y key n p n p proton p p n n n n p p p p n p p p n n neutron p n n n Which two diagrams represent isotopes of the same element? A V and Y B W and X C X and Y D Y and W
1 marks
Answer: C
This question in 0973/12 May/June 2020
Q6 · The diagrams represent pairs of nuclei of some atoms 0973/11 Oct/Nov 2022
40 The diagrams represent pairs of nuclei of some atoms. Which pair shows nuclei of different isotopes of the same element? A B key neutron proton C D
1 marks
Answer: B
This question in 0973/11 Oct/Nov 2022
Q7 · An atom of an isotope of strontium (Sr) has a proton number of 38 and contains 52 neutrons 0973/12 May/June 2024
39 An atom of an isotope of strontium (Sr) has a proton number of 38 and contains 52 neutrons. What is the nuclide notation for this isotope? A 52 Sr B 90 Sr C 38 Sr D 90 Sr 38 38 52 52
1 marks
Answer: B
This question in 0973/12 May/June 2024
Q8 · An element has two isotopes 0973/11 Oct/Nov 2024
39 An element has two isotopes. Which statement about the nuclei of atoms of these isotopes is correct? A They have equal numbers of neutrons but different numbers of electrons. B They have equal numbers of neutrons but different numbers of protons. C They have equal numbers of protons but different numbers of electrons. D They have equal numbers of protons but different numbers of neutrons.
1 marks
Answer: D
This question in 0973/11 Oct/Nov 2024
Q9 · Which row describes particles present in Mg 25 2+? 0973/12 May/June 2025
14 Which row describes particles present in Mg 25 2+? 12 neutrons electrons A 12 10 B 12 12 C 13 12 D 13 10
1 marks
Answer: D
This question in 0973/12 May/June 2025
Q10 · What is the nucleon number of the potassium isotope 40 K? 0973/11 Oct/Nov 2025
15 What is the nucleon number of the potassium isotope 40 K? 19 A 19 B 21 C 40 D 59
1 marks
Answer: C
This question in 0973/11 Oct/Nov 2025
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