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Which of the following element has the highest ionisation enthalpy?

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in Chemistry – Class 12 by (188k points)
Which of the following element has the highest ionisation enthalpy?

(a) Scandium

(b) Vanadium

(c) Copper

(d) Zinc

I have been asked this question during an interview for a job.

The query is from General Properties of the Transition Elements (D-Block) topic in division D and F-Block Elements of Chemistry – Class 12

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Best answer
Right choice is (d) Zinc

The best explanation: Ionisation enthalpy shows only a little variation on moving along the period of d-block elements. The first ionisation enthalpy of zinc, cadmium and mercury are higher than the other elements in their respective periods because of the fully filled (n-1)d^10ns^2 configuration.

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