Question:medium

Which of the following pairs has the same size?

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Lanthanide contraction equalizes sizes of 4d and 5d elements.

Updated On: Mar 18, 2026

Fe²⁺, Ni²⁺
Zr⁴⁺, Ti⁴⁺
Zr⁴⁺, Hf⁴⁺
Zn²⁺, Hf⁴⁺

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The Correct Option is C

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