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QNEET-2022-Ch-373: NEET 2022 Chemistry - Class 11 NEET-2022-Ch-373 Solution: Gadolinium has a low value of third ionisation enthalpy because …
Gadolinium has a low value of third ionisation enthalpy because of small size high exchange enthalpy high electronegativity high basic character
Multiple Choice Options
- A small size
- B high exchange enthalpy
- C high electronegativity
- D high basic character
Step-by-Step Verified Solution
Electronic configuration of Gadolinium
Gd :- [Xe] 4f 7 5d 1 6s 2
In case of 3 rd ionisation enthalpy electron will be removed from 5d and resultant configuration will be [Xe]4f 7 that is stable electronic configuration as it will have high exchange energy, hence less energy will be required to remove 3 rd electron.