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Four successive members of the first row...

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy ?

A

Cr(Z=24)

B

Mn(Z=25)

C

Fe(Z=26)

D

Co(Z=27)

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The correct Answer is:
D
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 3
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  16. The highest value of the calculated spin-only magnetic moment (in BM)...

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  17. The transition element that has lowest enthalpy of atomisation, is :

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