DP Chemistry (first assessment 2025)

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Question 19N.2.SL.TZ0.1c

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.2.SL.TZ0.1c
Level	SL	Paper	2	Time zone	TZ0
Command term	Distinguish	Question number	c	Adapted from	N/A

c.

[Maximum mark: 1]

19N.2.SL.TZ0.1c

(c)

Distinguish ultraviolet light from visible light in terms of wavelength and energy.

[1]

Markscheme

«UV» shorter wavelength AND higher energy «than visible» ✔

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.