Why Zr and Hf exhibit similar properties ?

Write consequences of Lanthanoid contraction. Why Zr and Hf exhibit siumilar properties ?

Why Zr and Hf show similar chemical properties ?

Name the phenomenon responsible for the similar properties of Zr and Hf Define it.

What do you understand by the term periodicity? Do the properties of two elements placed in a same group havevthe similar properties ?IIIustrate.

Write the electronic configuration of the elements A, B, C, D, E with atomic numbers 5, 6, 14, 13 and 15. Which have similar chemical properties ?

Why do the elements present in a group show similar chemical properties?

Why do elements in the same group have similar physical and chemical properties ?