Question

What is lanthanoids contractions? What are its consequences?

Answer 1

Explanation:

In Lanthanoids from left to right there is a gradually decreasing

atomic size is known as Lanthanoid contraction. This is due to

poor sheilding effect of f orbital.

consequences

1. The seperation of lanthonids very difficult.
2. The following pair of elements have similar atomic sizes

Ex: Zr and Hf, Nb and Ta, Mo and W

Hope it is understand for everyone