plumiElectronic configurations: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 2.2.4 Electronic configurations, 2019–2025, with mark schemes and examiner’s reports where available.
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Q22(b)
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All 28 questions on Electronic configurations, as a list
- January 2025, AS Unit 1, Q22(b) (2 marks): Explain whether or not all of the electrons in the n = 2 energy level have the same energy. (2)
- October 2024, AS Unit 1, Q12 (1 mark): Which ion is isoelectronic with a noble gas atom (Group 0/8)? A H+ B O– C Sc3+ D Zn2+
- October 2024, AS Unit 1, Q21(a)(i) (1 mark): Give the electronic configuration of aluminium. (1)
- October 2024, AS Unit 1, Q21(a)(ii) (2 marks): Compare and contrast the electronic structures of boron, aluminium and thallium. (2)
- June 2024, AS Unit 1, Q6(a) (1 mark): What is the electronic configuration of an atom of calcium? (1) A [Ne] 3s1 B [Ar] 4s1 C [Ne] 3s2 D [Ar] 4s2
- June 2024, AS Unit 1, Q6(b) (1 mark): What is the electronic configuration of a Cr3+ ion? (1) A [Ar] 3d24s1 B [Ar] 3d3 C [Ar] 3d4 D [Ar] 3d5 Use this space for any rough working. Anything you write
- January 2024, AS Unit 1, Q2 (1 mark): Which diagram represents the electronic structure of a nitrogen atom? 1s 2s 2p A ↑↓ ↑ ↑↓ ↑ ↑ B ↑↓ ↑ ↑↓ ↑↓ C ↑↓ ↑↓ ↑ ↑ ↑ D ↑↓ ↑↓ ↑↓ ↑
- January 2024, AS Unit 2, Q21(a) (1 mark): Give the complete electronic configuration, using s, p, d notation, of a calcium atom in the ground state. (1)
- October 2023, AS Unit 1, Q21(b)(i) (1 mark): Give the electronic configuration of the nickel ion present in nickel(II) compounds. (1)
- January 2023, AS Unit 1, Q10 (1 mark): Which is the electronic configuration of chromium? 3d 4s A [Ar] B [Ar] C [Ar] D [Ar] Use this space for any rough working. Anything you write in this space will
- October 2022, AS Unit 1, Q4 (1 mark): What is the total number of orbitals in a sulfur atom which contain at least one electron? A 3 B 5 C 8 D 9
- October 2022, AS Unit 1, Q11(a) (1 mark): Which element has only one p orbital containing a pair of electrons? (1) A element U B element V C element W D element X
- October 2022, AS Unit 1, Q16(c) (1 mark): Give the electronic configuration of a germanium atom. (1)
- June 2022, AS Unit 1, Q8 (1 mark): What is the electronic configuration of a nitrogen atom? A 1s 2s 2p B 1s 2s 2p C 1s 2s 2p D 1s 2s 2p
- June 2022, AS Unit 1, Q9 (1 mark): The element manganese has the atomic number Z = 25. What are the numbers of s, p and d electrons in an atom of manganese? s electrons p electrons d electrons A
- January 2022, AS Unit 1, Q20(a) (2 marks): Complete the electronic configurations of Cu and Cu2+. (2) Cu [Ar] Cu2+ [Ar]
- October 2021, AS Unit 1, Q12(a) (2 marks): Complete the electronic configurations of the atoms of beryllium and calcium using the s, p, d notation. (2) Be 1s2 Ca 1s2
- June 2021, AS Unit 1, Q6 (1 mark): Which ion has the electronic configuration 1s2 2s2 2p6 3s2 3p6 in its ground state? A Al3+ B Cl− C N3− D Na+
- January 2021, AS Unit 1, Q6 (1 mark): A p-block element in Period 3 of the Periodic Table reacts to form an ionic compound. What could be the electronic configuration of the ion formed by this eleme
- January 2021, AS Unit 1, Q18(a) (2 marks): Complete the diagram to show the electronic configuration for a sulfur atom in the ground state. Include labels for each subshell. (2) Energy 1s
- October 2020, AS Unit 1, Q9 (1 mark): Which ion does not have the electronic configuration shown? ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 1s 2s 2p 3s 3p A K+ B Ca2+ C Ti2+ D Sc3+
- October 2020, AS Unit 1, Q10 (1 mark): What is the electronic configuration of the nitride ion, N3– ? A 1s2 2s2 B 1s2 2s2 2p3 C 1s2 2s2 2p4 D 1s2 2s2 2p6
- October 2020, Unit 5, Q25(b)(i) (1 mark): The Lanthanides The lanthanides form a series in the Periodic Table comprising the elements from lanthanum, La (Z = 57) to lutetium, Lu (Z = 71). They have impo
- October 2020, Unit 5, Q25(b)(ii) (1 mark): The Lanthanides The lanthanides form a series in the Periodic Table comprising the elements from lanthanum, La (Z = 57) to lutetium, Lu (Z = 71). They have impo
- January 2020, AS Unit 1, Q4 (1 mark): Which element is in the p-block and has atoms containing two unpaired electrons in the ground state? A lithium B carbon C fluorine D titanium
- January 2020, AS Unit 1, Q18(a) (1 mark): Give the electronic configuration, using the s, p, d notation, for a chlorine atom in the ground state. (1)
- June 2019, AS Unit 1, Q15 (1 mark): Which is the electronic configuration of the Sc3+ ion? A 1s2 2s2 2p6 3s2 3p6 B 1s2 2s2 2p6 3s2 3p5 3d1 C 1s2 2s2 2p6 3s2 3p6 3d1 4s2 D 1s2 2s2 2p6 3s2 3p6 3d4 4
- January 2019, AS Unit 1, Q3 (1 mark): Which is the electronic configuration of a carbon atom in its ground state? 1s 2s 2p A B C D
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