ConceptConceptDocsDocuments

IB Chemistry SL 3.1.2 Electron configuration and position Question Bank

Practise IB Chemistry SL 3.1.2 by linking electron configuration to an element’s group, period and position in the periodic table.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Deduce the highest occupied energy level and outer-electron information from an element’s period or group.
  • Write or identify an electron configuration for an element in a stated position.
  • Use electron arrangement to classify an element and justify its periodic-table location.

3.1.2—Electron configuration and position question 1

[Maximum number: 2]

Iron rusts in the presence of oxygen and water. Rusting is a redox process involving several steps that produces hydrated iron(III) oxide, Fe2O3∙nH2O\mathrm{Fe}_{2} \mathrm{O}_{3} \bullet \mathrm{nH}_{2} \mathrm{O}, as the final product. The half-equations involved for the first step of rusting are given below.

Half-equation 1: Fe(s)→Fe2+(aq)+2e−\quad \mathrm{Fe}(\mathrm{s}) \rightarrow \mathrm{Fe}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-}

Half-equation 2: O2(aq)+4e−+2H2O(l)→4OH−(aq)\quad \mathrm{O}_{2}(\mathrm{aq})+4 \mathrm{e}^{-}+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow 4 \mathrm{OH}^{-}(\mathrm{aq})

State the relationship between the electron arrangement of an element and its group and period in the periodic table.

All question bank results loaded