Chemistry · Electronic configuration of elements and extra stability of half-filled and completely filled orbitals

The stability of ferric ion is due to

The stability of ferric ion is due to

  • A. half filled f-orbitals
  • B. half filled d-orbitals
  • C. completely filled f-orbitals
  • D. completely filled d-orbitals

Step-by-step solution

Fe3+ has the electronic configuration [Ar] 3d5, which is a half-filled d subshell. This configuration provides extra stability due to symmetrical distribution of electrons and exchange energy, which lowers the energy of the ion.
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