Question
Question: The atomic numbers of V,Cr,Mn and Fe are respectively 23,24,25 and 26. Which one of these may be exp...
The atomic numbers of V,Cr,Mn and Fe are respectively 23,24,25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
A
Cr
B
Mn
C
Fe
D
V
Answer
Cr
Explanation
Solution
Cr+ has stable half filled electronic configuration, [Ar]18 3d5 4s0. the removal of one more electron from this stable half filled configuration will require higher energy.