Question

Which of the following atom has almost
same size?
Sn, Pb

Br,I

Zr, Hf

Ba, Sr​

Answer 1

Answer:

zr, hf

Explanation:

in general the atomic and ionic radii increases on moving down radii increase on moving down a group the element of second transmission series that are have almost same radii S P element of third translation as if this is because of lantonide concentration