What happens to the atomic size as you go down the group?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Increases.
As you go down a group in the periodic table, the atomic size increases. This increase occurs because each successive element has an additional electron shell, which places the outermost electrons farther from the nucleus. Although the nuclear charge also increases, the effect of the added electron shells outweighs this, leading to a larger atomic radius. The increased distance between the nucleus and the outer electrons reduces the effective nuclear pull, resulting in a larger atomic size.