Question

Why Zr and Hf have similar props? Clarify

Answer 1

Hey Mate :-) Here is Your ans ---Zr and Hf exhibit similar properties due to lanthanoid contraction. Electrons present in f subshell didn't do good shielding due to which with the increasing atomic number or increasing effective nuclear charge size gets constricted and size of Halfenium and Zirconium becomes almost equal.
Hope It's Helpful for you :-) Have a god day:-)