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Question

Order of atomic radii of Ti, Zr, Hf is:


A
Ti > Zr > Hf
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B
Ti < Zr < Hf
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C
Ti < Zr = Hf
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D
Ti = Zr = Hf
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Solution

The correct option is C Ti < Zr = Hf
As we move down in a group, radii increases but Zr and Hf have almost same radius due to poor shielding of f-orbitals (in Hf).

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