Q. 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
Explanation
(b)
$Fe^{3 +}$ ion has the following configuration
$Fe^{3 +} = 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{5}$
Hence, ferric ion is quite stable due to half-filled $d$-orbitals.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.