Gadolinium has a low value of third ionisation enthalpy because of

Question

Gadolinium has a low value of third ionisation enthalpy because of (A) high basic character (B) small size (C) high exchange enthalpy (D) high electronegativity

Tardigrade Admin · Accepted Answer

64 Gd =[ Xe ] 6 s 2 4 f 7 5 d 1 Gd +2 =[ Xe ] 4 f 7 5 d 1 After losing 5 d electron 4 f has maximum exchange energy so Gd has low value of Third Ionisation energy

Q. Gadolinium has a low value of third ionisation enthalpy because of

high basic character

small size

high exchange enthalpy

high electronegativity

$_{64} G d = [X e] 6 s^{2} 4 f^{7} 5 d^{1}$
$G d^{+ 2} = [X e] 4 f^{7} 5 d^{1}$
After losing $5 d$ electron $4 f$ has maximum exchange energy so Gd has low value of Third Ionisation energy

Q. Gadolinium has a low value of third ionisation enthalpy because of

high basic character

small size

high exchange enthalpy

high electronegativity

64​Gd=[Xe]6s24f75d1 Gd+2=[Xe]4f75d1 After losing 5d electron 4f has maximum exchange energy so Gd has low value of Third Ionisation energy

$_{64} G d = [X e] 6 s^{2} 4 f^{7} 5 d^{1}$
$G d^{+ 2} = [X e] 4 f^{7} 5 d^{1}$
After losing $5 d$ electron $4 f$ has maximum exchange energy so Gd has low value of Third Ionisation energy