Q. The number of unpaired electrons in $Fe^{3 +}$ion is
A) 3
B) 1
C) 5
D) 2
Explanation
(c)
The electronic configuration of Fe atom is
$Fe\ (26) = \lbrack Ar\rbrack 3d^{6}4s^{2}$
$Fe^{3 +} = \lbrack Ar\rbrack 3d^{5}4s^{0}$
[table] $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ [/table]
five unpaired electrons
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.