DP Chemistry (first assessment 2025)

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Question 21N.1A.SL.TZ0.6

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.1A.SL.TZ0.6
Level	SL	Paper	1A	Time zone	TZ0
Command term	Identify	Question number	6	Adapted from	N/A

6.

[Maximum mark: 1]

21N.1A.SL.TZ0.6

Which ion has the largest radius?

A. Na⁺

B. Mg²⁺

C. P³⁻

D. S²⁻

[1]

Markscheme

C

Syllabus sections

Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.10—Transition element complexes are coloured due to the absorption of light when an electron is promoted between the orbitals in the split d-sublevels. The colour absorbed is complementary to the colour observed. Apply the colour wheel to deduce the wavelengths and frequencies of light absorbed and/or observed.