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Question

Ionic radii gradually increases from Sc+2 to Cu+2 in 3d series – True or False?

A
True
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B
False
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Solution

The correct option is B False
Ionic radii for Sc2+ and Ti2+ are not even defined! Similar to the atomic radii, there is no proper trend in ionic radii either. For V2+ the ionic radius is 79 pm and for both Cr2+ andMn2+, the ionic radii are 82 pm. From Mn2+ to Ni2+, there is a minor but gradual decrease. From there the ionic radii for Cu2+ and Zn2+ increases!

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