Question

For the given elements and their atomic numbers, which of these have the highest second ionization enthalpy?

Answer 1

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Next similar questionQ)

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)V(b)Cr(c)Mn(d)Fe

A)

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The electronic configurations are as follows;

V:(Ar)3d34s2

Cr:(Ar)3d54s1

Mn:(Ar)3d54s2

Fe:(Ar)3d64s2

The second ionization of Cr means removal of electron from the stable configuration of 3d5.

The highest second ionization enthalpy is Cr

Hence b is the correct answer.