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CGP EDU Academic Team
Published on: August 12, 2026
Which of the following element has the highest ionisation enthalpy?
Text Solution
Verified by ExpertsThe correct answer is:
D
Ionisation enthalpy shows only a little variation on moving along the period of 
-block
elements. The first ionisation enthalpy of zinc, cadmium and mercury are higher than the other elements in their respective series because of the fully-filled 
electronic configuration.
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