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Chemistry · May / June 2025 · Paper 11 · Question 24

5070Group VII properties

Which statement is correct?

  1. ANoble gases are unreactive because they all have eight electrons in their outer shells.
  2. BThe Group VII element astatine, At2, is expected to be a black solid at room temperature.
  3. CThe reactivity of the elements in both Group I and Group VII increases down the group.
  4. DWhen aqueous chlorine is added to aqueous potassium bromide, there is no change in colour.

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Correct answer: B. The Group VII element astatine, At2, is expected to be a black solid at room temperature.

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