Question

Give scientific reason : Atomic radius goes on increasing down a group.

Answer 1

Atomic radius increases as we move from top to bottom in a group of the periodic table $\text{because a new shell}$$\text{of electrons are added to the atoms at every step. As the number of shells in the atoms increases gradually due to which the}$$\text{size of atoms also increases. As the size of the atoms increases which leads to an increase in atomic radius}$ of an atom.