Question

how does the atomic size vary on going down from top to bottom in a group of the periodic table why does it vary these way

Answer 1

Answer:

On going down in a group of the periodic table, the atomic size increases. When we move from top to bottom in a group, a new shell of electrons is added to the atoms at every step due to which the size of atom increases.

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Answer 2

Answer:

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On going down in a group of the periodic table, the atomic size increases. When we move from top to bottom in a group, a new shell of electrons is added to the atoms at every step due to which the size of atom increases.