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Date November 2017 Marks available 1 Reference code 17N.1.SL.TZ0.23
Level Standard level Paper Paper 1 Time zone 0 - no time zone
Command term Question number 23 Adapted from N/A

Question

Which statement about atomic spectra is not true?

A. They provide evidence for discrete energy levels in atoms.

B. Emission and absorption lines of equal frequency correspond to transitions between the same two energy levels.

C. Absorption lines arise when electrons gain energy.

D. Emission lines always correspond to the visible part of the electromagnetic spectrum.

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Core » Topic 7: Atomic, nuclear and particle physics » 7.1 – Discrete energy and radioactivity
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