DP Chemistry (first assessment 2025)

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Question 21N.2.SL.TZ0.9b(ii)

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.2.SL.TZ0.9b(ii)
Level	SL	Paper	2	Time zone	TZ0
Command term	State	Question number	b(ii)	Adapted from	N/A

b(ii).

[Maximum mark: 1]

21N.2.SL.TZ0.9b(ii)

(b(ii))

State the electron configuration of copper.

[1]

Markscheme

1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰
OR
[Ar] 4s¹3d¹⁰ ✔

Accept configuration with 3d before 4s.

Syllabus sections

Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.5—Each orbital has a defined energy state for a given electron configuration and chemical environment, and can hold two electrons of opposite spin. Sublevels contain a fixed number of orbitals, regions of space where there is a high probability of finding an electron. Apply the Aufbau principle, Hund’s rule and the Pauli exclusion principle to deduce electron configurations for atoms and ions up to Z = 36.