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Date May 2011 Marks available 1 Reference code 11M.1.sl.TZ2.7
Level SL Paper 1 Time zone TZ2
Command term State Question number 7 Adapted from N/A

Question

In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum?

A.     \(n = 2 \to n = 1\)

B.     \(n = 3 \to n = 2\)

C.     \(n = 2 \to n = 3\)

D.     \(n = \infty  \to n = 1\)

Markscheme

B

Examiners report

One respondent suggested that guesswork may be required to answer this question. However, this question was based on the emission spectrum of hydrogen, which relates to AS 2.3.3 in the guide and in the Teacher‟s notes it is clearly stated that the ultraviolet, visible and infrared regions of the spectrum should be considered. The question itself was answered correctly by 58.93% of candidates.

Syllabus sections

Core » Topic 2: Atomic structure » 2.2 Electron configuration
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