Atomic structure and the Periodic Table — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

14 Which row shows the electronic structure of a calcium atom and of a fluoride ion? calcium atom fluoride ion A 2,8,8 2,7 B 2,8,8 2,8 C 2,8,8,2 2,7 D 2,8,8,2 2,8

1 marks

Answer: D

This question in 0654/23 May/June 2017

21 The electronic structures of four particles are shown. 1 2 3 4 Which diagrams represent the electronic structures of a Group VI atom and its ion? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2018

21 Which electronic structure is for a non-metallic element? A 2 B 2,2 C 2,8,2 D 2,8,8,2

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2020

14 The protons, neutrons and electrons in a particle are shown. key proton neutron electron Which symbol represents this particle? A F B F – C Ne D Ne+

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2021

15 An atom of fluorine is represented by 19 9F. How many electrons does this atom contain? A 9 B 10 C 19 D 28

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2022

15 An atom of an element contains 9 protons, 10 neutrons and 9 electrons. What is the nucleon number (mass number) of this element? A 9 B 10 C 19 D 28

1 marks

Answer: C

This question in 0654/22 Oct/Nov 2022

16 Which row describes an atom that has the nucleon number 24? number of number of number of protons neutrons electrons A 8 8 8 B 12 12 12 C 21 24 21 D 24 28 24

1 marks

Answer: B

This question in 0654/21 May/June 2023

16 An atom of osmium is represented by 190 76Os. How many neutrons are in this atom? A 76 B 114 C 190 D 266

1 marks

Answer: B

This question in 0654/22 May/June 2023

15 An atom of indium has the atomic number 49 and the nucleon number 115. Which row shows the numbers of protons, neutrons and electrons in this atom? number of number of number of protons neutrons electrons A 49 66 49 B 49 115 49 C 66 49 49 D 49 66 66

1 marks

Answer: A

This question in 0654/23 May/June 2023

16 The nucleon number of a hydrogen atom is 1. What is present inside the nucleus of this atom? A one proton and one electron B one proton and one neutron C one proton only D one neutron only

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2023

22 Which electronic structure belongs to a non-metallic element? A 2 B 2,2 C 2,8,2 D 2,8,8,2

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2024

14 The numbers of protons, neutrons and electrons in four particles are shown. number of number of number of particle protons neutrons electrons W 20 20 20 X 19 20 19 Y 20 22 18 Z 21 24 21 Which two particles are isotopes of the same element? A W and X B W and Y C X and Y D Y and Z

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2024

16 The electronic configurations of four particles are shown. 1 2 3 4 Which diagrams represent the electronic configurations of a Group VI atom and its ion? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0654/21 May/June 2025

14 Atoms of element X have 11 nucleons and 6 neutrons. What is element X? A boron B carbon C chlorine D sodium

1 marks

Answer: A

This question in 0654/23 May/June 2025

14 Which particle has the same number of electrons in its outer shell as an atom of sodium, 23 Na? 11 A 23 11Na + B 23 11Na  C 24 11Na D 24 12Na 2+

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2025

14 Which row shows the electronic configuration of a calcium atom and of a fluoride ion? calcium atom fluoride ion A 2,8,8 2,7 B 2,8,8 2,8 C 2,8,8,2 2,7 D 2,8,8,2 2,8

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2025