Question

The Lanthanoids contraction is responsible for the fact that:

• A. Zr and Y have about the same radius
• B. Zr and Nb have similar oxidation state
• C. Zr and Hf have about the same radius
• D. Zr and Zn have the same oxidation state

Answer 1

Answer: (C)

Zr and Hf have about the same radius

The Lanthanoids contraction is responsible for the fact that Zr and Hf have about the same radius.

The radius of Zr is 145 pm and the radius of Hf is 144 pm.