IB Chemistry SL 1.3.5 Orbitals and Electron Spin

Practise building ground-state electron configurations for atoms and ions up to Z = 36. Apply the Aufbau principle, Hund's rule and Pauli exclusion principle, use full or…

Syllabus
First assessment 2025
Objective
1.3.5
Level
SL

Exam points

  • write full or condensed configurations for atoms and ions, removing outer electrons first
  • draw orbital-box diagrams with correct energy order, opposite spins and single filling
  • apply the chromium and copper exceptions instead of forcing a simple Aufbau pattern

1.3.5—Orbitals and electron spin question 1

[Maximum number: 1]

Chlorine undergoes many reactions.

State the full electron configuration of the chlorine atom.

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