DP Chemistry (last assessment 2024)

Question 22N.2.sl.TZ0.a

Date	November 2022	Marks available	[Maximum mark: 1]	Reference code	22N.2.sl.TZ0.a
Level	sl	Paper	2	Time zone	TZ0
Command term	State	Question number	a	Adapted from	N/A

[Maximum mark: 1]

22N.2.sl.TZ0.a

Consider the following reaction:

Cu²⁺ (aq) + Fe (s) → Fe²⁺(aq) + Cu (s)

State the ground-state electron configuration for Fe²⁺.

[1]

Markscheme

1s²2s²2p⁶3s²3p⁶3d⁶

[Ar]3d⁶ ✔

Examiners report

Surprisingly poorly answered. Only 20% of the candidates recognized that the 4s electrons are lost before the 3d electrons and calculated the number of electrons in Fe²⁺ correctly. A small proportion of candidates did not list the subshells in the correct order.

Syllabus sections

Core

Core » Topic 2: Atomic structure » 2.2 Electron configuration

Core » Topic 2: Atomic structure

Question 22N.2.sl.TZ0.a

Select a Test

Syllabus sections

Confirm action