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Date November 2014 Marks available 1 Reference code 14N.1.sl.TZ0.5
Level SL Paper 1 Time zone TZ0
Command term Question number 5 Adapted from N/A

Question

Which ion will show the least deflection in a mass spectrometer?

A.     \(^{{\text{35}}}{\text{C}}{{\text{l}}^ + }\)

B.     \(^{{\text{35}}}{\text{C}}{{\text{l}}^{2 + }}\)

C.     \(^{{\text{35}}}{\text{C}}{{\text{l}}^{{\text{35}}}}{\text{C}}{{\text{l}}^ + }\)

D.     \(^{{\text{35}}}{\text{C}}{{\text{l}}^{{\text{37}}}}{\text{C}}{{\text{l}}^ + }\)

Markscheme

D

Examiners report

We recognize that students might have found the molecular ions confusing. The question was answered correctly by 49.8% of the candidates and the question discriminated well (0.48). This is an example of a question set to discriminate the higher-grade candidates.

Syllabus sections

Core » Topic 2: Atomic structure » 2.1 The nuclear atom
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