Question

why do atomic radius decrease from top to bottom in a periodic table​

Answer 1

Answer:

The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. 2) As you move across a period, atomic radius decreases.

Answer 2

Down the group atomic radii increases. atomic radii means the distance between the centre of the atom( nucleus) to its valence shell. In a group as we move downwards new shell are added.