Question

The lanthanide contraction is responsible for the fact thatzn and zr have the same oxidation state zr and hf have about the same radius zr and nb have similar oxidation state zr and y have about the same radius

Answer 1

Answer:

Explanation:

In each vertical column of transition elements, the elements of second and third transition series resemble each other more closely than the elements of first and second transition series on account of lanthanide contraction.

The pairs of elements such as Zr-­Hf, Mo-­W, Nb-­Ta, etc possess almost the same properties.