Gadolinium has a low value of third ionisation enthalpy because of:
Gadolinium has a low value of third ionisation enthalpy because of:
Option 1 -
Small size
Option 2 -
High exchange enthalpy
Option 3 -
High electronegativity
Option 4 -
High basic character
Asked by Shiksha User
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1 Answer
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Correct Option - 2
Detailed Solution:Gadolinium has outer configuration of [Xe]4f?5d¹6s².
Its third ionization energy is low due to highly exchange energy and hence stability of the half-filled f subshell.
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