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CAIE A-Level Chemistry 9.3.1 Predicting Properties within a Group

Practise using established group trends and valence-electron patterns to predict properties of an unfamiliar element.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Predict electronegativity and volatility for an unfamiliar Group 17 element using trends down the group
  • Predict physical state, oxidising power and hydride stability for an unfamiliar Group 17 element
  • Use group and period trends to predict outer orbital, atomic radius and first ionisation energy

9.3.1—The characteristic properties of an element question 1

[Maximum number: 1]

The element astatine, At, is below iodine in Group 17 of the Periodic Table.
Which statements concerning At are likely to be correct?

1 It is a dark-coloured solid at room temperature.
2 It is a more powerful oxidising agent than iodine.
3 Its hydride is more thermally stable than HBr .

A

1, 2 and 3 are correct

B

1 and 2 only are correct

C

2 and 3 only are correct

D

1 only is correct

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