Question

give reason as to why the atomic radius element increase in a group while moving from the top to bottom

Answer 1

atomic radius is the distance between the nucleus till the outermost shell and as we go down the group new shells are added as we go down the group

Answer 2

Hello mate,

Here is your answer,

As we move down the group the atomic size increases because new shells are being added and this increases the distance between the nucleus and outermost electron.