question_answer

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

Correct Answer: B

Solution :

                 Key Idea Half-filled or completely filled orbitals are quite stable than incompletely filled orbitals. The atomic number of iron is 26 and its electronic configuration is \[3{{d}^{6}}\,4{{s}^{2}}\].                 In ferric ion d-orbital is half filled therefore, the stability of ferric ion is due to half filled d-orbitals.