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IB Chemistry SL 3.1.4 Group trends Question Bank

Practise IB Chemistry SL 3.1.4 by using group trends to predict atomic size, reactivity and reactions of representative elements.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Describe how atomic radius, melting point or reactivity changes down a named group.
  • Use group trends to predict which metal or halogen reacts more strongly in a stated comparison.
  • Write or select an equation for a representative group reaction and link it to the trend.

3.1.4—Group trends question 1

[Maximum number: 2]

Chlorine occurs in Group 7, the halogens.

Question (a)

(a)

Chlorine has an electronegativity value of 3.2 on the Pauling scale.

[ 2 ]

Question (i)

(i)

State the balanced chemical equation for the reaction of potassium bromide, KBr(aq), with chlorine, Cl2(aq)\mathrm{Cl}_{2}(\mathrm{aq}).

[ 1 ]

Question (ii)

(ii)

Describe the colour change likely to be observed in this reaction.

[ 1 ]
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