DP Chemistry (first assessment 2025)

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Question 22M.2.SL.TZ2.2b(iii)

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.2.SL.TZ2.2b(iii)
Level	SL	Paper	2	Time zone	TZ2
Command term	Draw, Label	Question number	b(iii)	Adapted from	N/A

b(iii).

[Maximum mark: 1]

22M.2.SL.TZ2.2b(iii)

(b(iii))

Draw an arrow, labelled Z, to represent the lowest energy electron transition in the visible spectrum.

[1]

Markscheme

downward or upward arrow between n = 3 and n = 2 ✔

Syllabus sections

Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.1—Emission spectra. Emission spectra are produced by atoms emitting photons when electrons in excited states return to lower energy levels. Qualitatively describe the relationship between colour, wavelength, frequency and energy across the electromagnetic spectrum. Distinguish between a continuous and a line spectrum.

Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.2—The line emission spectrum of the hydrogen atom. The line emission spectrum of hydrogen provides evidence for the existence of electrons in discrete energy levels, which converge at higher energies. Describe the emission spectrum of the hydrogen atom, including the relationships between the lines and energy transitions to the first, second and third energy levels.