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Edexcel IAL Chemistry A2 17.2 Period 4 d-block electronic configurations

Edexcel IAL Chemistry A2 17.2 Period 4 d-block electronic configurations
Pearson Edexcel IAL Chemistry syllabusChemistry YCH11First assessment 2019

Remove 4s electrons first when forming ions, remember chromium and copper exceptions, and use d-orbital occupancy to justify stability or unpaired electrons.

How this is tested

  • Deduce d-block ion configurations such as Zn2+, Fe2+, Ni2+ and Cu+ from charge.
  • Use chromium and copper exceptions when writing Period 4 atom configurations.
  • Explain stability or redox behaviour from half-filled or filled 3d subshells.