A-LevelChemistryGroup 179701/12 · Feb/Mar 2018 · Q161 Mark

The volatility of the Group 17 elements, chlorine, bromine and iodine, decreases down the group. What is responsible for this?

Abond length in the halogen molecule

Bbond strength in the halogen molecule

Celectronegativity of the halogen

Dnumber of electrons in the halogen molecule

✓ Correct answer

D: number of electrons in the halogen molecule

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Topic: Group 17, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2018 Paper 1 Variant 2, question 16.

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