The periodic table

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Question 16
Medium

The halogens in Group 7 of the periodic table exhibit clear trends in their reactivity and properties.

a.

Explain, in terms of atomic structure, the trend in reactivity as you descend Group 7 from chlorine to iodine.

[3]
b.

An aqueous solution of chlorine, Cl2(aq)\text{Cl}_2\text{(aq)}Cl2​(aq), is added to an aqueous solution of potassium bromide, KBr(aq)\text{KBr(aq)}KBr(aq).

  • State whether a displacement reaction occurs.
  • Write the balanced ionic equation for this reaction, including state symbols.
  • Describe the colour change observed in the mixture.
[4]

The periodic table Questions

  1. GCSE
  2. /Chemistry
  3. /The periodic table