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Published on: August 21, 2026
Gadolinium has a low value of third ionisation enthalpy because of
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Gadolinium has a low value of third ionisation enthalpy because of high exchange enthalpy.
Electronic configuration of Gadolinium [Gd) = [Xe] 4f 7 5d 1 6s 2
For 3 rd ionisation enthalpy, electron will be removed from 5d,
So the resultant configuration will be [Xe]4f 7 that is stable electronic configuration as it will have high exchange energy.
Therefore, less energy will be required to remove 3 rd electron
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