Comprehension Passage
Elements of the 2nd and 3rd transition series show lots of similarities in their chemical and physical properties. The atomic size of Zr and Hf are almost the same. This is because of the presence of lanthanides as the inter-transition element.
The phenomenon which justifies similarity in properties is
1
Lanthanoid contractions
2
Inert pair effect
3
Relativity
4
Diagonal relationship